In doing a bit of research recently, I came across the fact that there were a number of titles that were missed by the compiler of Lincoln Lore's "Cumulative Bibliography" for the year 1989. Lincoln Lore chose to discontinue their "Cumulative Bibliography" when the monthly publication of the periodical ceased in 1990. Up to that point in time, Lincoln Lore had recorded twenty-two Lincoln titles published in 1989, and two in 1990.
With a bit of checking, it became apparent that the twenty-two items listed for 1989 did not include many Lincoln titles that appeared that year. In order to assemble as complete an unbroken bibliography as possible, I have assembled a listing of the additional titles that could have conceivably appeared in Lincoln Lore had they continued to publish their "Cumulative Bibliography."
In the list found below, you will note that I have, for purposes of clarity, listed the bibliographic number, author, and title of the twenty-two titles recorded by Lincoln Lore. I then list the additional titles uncovered in my research. This bibliography is not as complete as those I have assembled for the period of 1990-1998. In order to maintain a sense of continuity, I maintained Lincoln Lore's definition of Lincolniana for the 1989 bibliography.
The titles that appeared in Lincoln Lore are:
1989-1 Current, Richard N.
Lincoln, The Constitution, and Presidential Leadership
1989-2 Abraham Lincoln Association
Journal of the Abraham Lincoln Association (Vol. 10)
1989-3 Boritt, Gabor S.
Abraham Lincoln: War Opponent and War President
1989-4 Johannsen, Robert W.
Lincoln And The South In 1850 (McMurtry Lecture)
1989-5 Kincaid, Arthur, editor
John Wilkes Booth, Actor
1989-6 Lincoln, Abraham
Abraham Lincoln, Speeches and Writings, 1832-1858
1989-7 Lincoln, Abraham
Abraham Lincoln, Speeches and Writings, 1859-1865
1989-8 Newman, Ralph Geoffrey
Preserving Lincoln For The Ages, Collectors, Collections, And Our Sixteenth President (McMurtry Lecture)
1989-9 Boritt, Gabor S.
How Big Was Lincoln's Toe? or Finding a Footnote
1989-10 Bruce, Robert V.
The Shadow Of A Coming War (Fortenbaugh Lecture)
1989-11 Papers from Lincoln Colloquium
Papers From the Third Annual Lincoln Colloquium
1989-12 Lincoln Memorial University
Lincoln Herald (Vol. 91, No. 1)
1989-13 Lincoln Memorial University
Lincoln Herald (Vol. 91, No. 2)
1989-14 Lincoln Memorial University
Lincoln Herald (Vol. 91, No. 3)
1989-15 Lincoln Memorial University
Lincoln Herald (Vol. 91, No. 4)
1989-16 Louis A. Warren Lincoln Library and Museum
Lincoln and the Germans
1989-17 Louis A. Warren Lincoln Library and Museum
Lincoln Lore (Nos. 1799 - 1804)
1989-19 Rhodehamel, John H.
Washington, Jefferson and Lincoln: The Shaping of the American Presidency
1989-20 Simpson, George B.
Abe Lincoln's 1840 Kentucky Political Speech and the Whig Presidential Campaign of 1840 in Southern Illinois
1989-21 Sloan, Richard, editor
The Lincoln Group of New York Tenth Anniversary Commemorative Booklet
1989-22 Tierney, Tom
Abraham Lincoln and His Family (paper dolls)
Additional Lincolniana published in 1989:
Mitgang, Herbert, editor (1989-23)
Abraham Lincoln A Press Portrait (rule) Edited by Herbert Mitgang The University of Georgia Press Athens and London 
Book, paper, 8-3/8" x 5-1/2", xxiii p., 519 pp. Previously published under same title, this edition has a new preface by the editor.
Lincoln Legal Papers, The (1989-24)
(rule) (portrait of Lincoln) Baret v. Alton & Sangamon Railroad Company Illinois Supreme Court December Term 1851 The Lincoln Legal Papers A Documentary History of the Law Practice of Abraham Lincoln, 1836-1861 (cover title) [Springfield, IL, 1989]
Pamphlet, paper, 8-1/2" x 5-1/2", 30 (1) pp. A pamphlet distributed to major donors to the Lincoln Legal Papers project.
USS Abraham Lincoln (1989-25)
(illustration of Lincoln and aircraft carrier) Commissioning Of The USS Abraham Lincoln (CVN 72) November 11, 1989 Norfolk, Virginia (cover title)
Pamphlet, paper, 11" x 8-1/2", (1) 1-23 (2) 24-48 (1) pp., illus. Program for the commissioning ceremony for the aircraft carrier USS Abraham Lincoln. With decorative gold sting at spine.
Miller, Scott D. and Joseph E. Suppiger, editors (1989-26)
McMurtry On Lincoln Edited By Scott D. Miller Lincoln Memorial University and Joseph E. Suppiger Del Mar College Lincoln Memorial University Harrogate, Tennessee 37752 
Pamphlet, paper, 8-1/2" x 5-1/2", ix p., 45 pp., illus. Reprint five of McMurtry's articles that appeared in the Lincoln Herald, with a brief introduction be the editors.
Pfanz, Donald C. (1989-27)
The Petersburg Campaign Abraham Lincoln At City Point March 20 - April 9, 1865 (publisher's device) 1st Edition Donald C. Pfanz [Lynchburg, VA: H.E. Howard, Inc., 1989]
Book, cloth, (6) 124 pp., illus. Limited to 1,000 signed and numbered copies. Part of the Virginia Civil War Battles and Leaders Series. $10.00.
Williams, T. Harry (1989-28)*
Lincoln and His Generals. Dorset Books, 1989. ISBN 0880293314. $17.95.
Bruce, Robert V. (1989-29)*
Lincoln and the Tools of War. Urbana: University of Illinois Press, 1989. Paperback. $14.95.
Frost, Dick (1989-30)*
Lincoln's Legacy: An Investigative Odyssey Into Old Abe's Descendants as of the Year 1989: Exhaustive Photo Review and Commentary on all Abe Lincoln Descendants including the Last Lincoln, Timothy Lee Beckwith, 21 Year Old Heir to a Fortune and Name of Honor. Chicago: Aquarius Rising Sun, 1989. 74 leaves.
Sandel, Elias Wesley (1989-31)*
Lincoln, Man of Destiny. Florian, FL: E. W. Sandel, 1989. 186 pp.
Sloate, Susan (1989-32)*
Abraham Lincoln: The Freedom President. New York: Fawcett Columbine, 1989. Great Lives series. 122 pp. $3.95.
Stefoff, Rebecca (1989-33)*
Abraham Lincoln, 16th President of the United States. Ada, OK: Garrett Educational Co., 1989. vi p.m.., 122 pp. Juvenile title.
Brooks, Noah (1989-34)*
Washington in Lincoln's Time. Athens: University of Georgia Press, 1989. Paperback.
Chaconas, Joan L, Thomas S, Gwynn, Jr., and Laurie Verge
25th Anniversary Commemorative Booklet 1964 to 1989 Compiled by Joan L. Chaconas Thamsa S. Gwynn, Jr. Laurie Verge The Surratt Society The Surratt House 9110 Brandywine Road, PO Box427 Clinton, Maryland 20735 A Property of M-NCPPC -1989-
Pamphlet, paper, 8-1/2" x 5-3/8", (2) v (2) p., 53 (1) pp., Illus. Limited to 300 numbered copies.