Series 1. World War II experience circa 1939-2004, undated
Manuscript of Behind Japanese Lines With The Oklahoma Kid, The Leon Beck Story by Gordon Browne and copy of the final published version titled "A Fugitive Behind Japanese Lines: Private Leon Beck on Bataan 1941-1945" published in Infantry 1999, undated
Correspondence and telegrams from Earl R. Oatman to his parents during World War II including his time spent as a Prisoner of War 1941-1945
Publications, legal documents, transcripts and other material dealing with the American Prisoner of War lawsuit against Japan 1999-2004, undated
Handwritten medical record of Earl R. Oatman during the Bataan Death March as recorded by Oatman (photocopies) 1941-1945
Correspondence between Earl R. Oatman and others pertaining to the American Prisoner of War lawsuit against Japan 1999-2004
Military records including honorable discharge and separation qualification documents from the United States Army (photocopies) 1941-1946
Handwritten ledger detailing items purchased by Earl R. Oatman during his service in the United States Army including his credit, debit, and balance undated
Medals from the United States Army and Loma Linda VA Medical Center in recognition of Oatman's military service and experiences as a Prisoner of War undated
Photographs of Earl R. Oatman and his divisions during World War II 1940-1946
Documents and correspondence pertaining to the Bataan Death March and Paul L. Ashton's book Bataan Diary 1988, undated
Correspondence with the United States Department of Veterans Affairs pertaining to Earl R. Oatman's medical compensation from injuries sustained during World War II 2009
Correspondence and manuscript describing experiences of Earl R. Oatman and others as Prisoners of War during World War II 1966-1967, undated
Photographs (portraits) of Earl R. Oatman in uniform 1945, undated
Membership and identification cards of Earl R. Oatman for various veteran's associations 1982-2002, undated
Correspondence between Earl R. Oatman and the United States Department of Defense regarding unpaid quarters and subsistence allowances for guerilla fighters in the Philippine Islands during World War II 1997
Photographs used in Bataan: Only The Beginning by Earl R. Oatman undated
Partial manuscript of Bataan: Only The Beginning by Earl R. Oatman undated
Plates and captions for Bataan: Only the Beginning by Earl R. Oatman undated
Photographs of Earl R. Oatman in military uniform with friends and family 1945
Photographs, negatives, and maps pertaining to Earl R. Oatman's time as a Prisoner of War during World War II undated
Military rosters including the 34th Pursuit Squadron and American Prisoners of War at Funatsu 1944-2006
Dust jackets of Bataan: Only The Beginning by Earl R. Oatman undated
Manuscript and related material pertaining to the Fassoth family and Fassoth's Camp compiled by Earl R. Oatman undated
Manuscript of Bataan: Only the Beginning signed by Earl R. Oatman 1991
Oversize photographs and maps pertaining to Earl R. Oatman's time as a Prisoner of War during World War II undated
Photographs of the Philippines undated
Newspaper reprint from the Honolulu Star-Bulletin 2nd Extra with headline "Deaths Over 400 on Oahu, Latest Report" from December 7, 1941 1941
Series 2. Professional life 1951-2001, undated
Bibliography of scientific publications (primarily Entomology) by Earl R. Oatman undated
Title pages from student theses for which Earl R. Oatman served on the approval committee (photocopies) 1966-1983
Documents pertaining to Earl R. Oatman's work as an entomologist at UC Riverside undated
Research bulletins by Earl R. Oatman pertaining to insect disease and fruits 1960-1962
Photographs of plants and insects taken by Earl R. Oatman undated
Program of the University of Missouri Fifth Honors Convocation for Earl R. Oatman's graduation 1951
Laminated copies of Earl R. Oatman's educational diplomas and certificates 1951-1957
Series 3. Personal life circa 1897-2015, undated
Photographs of Earl R. Oatman with siblings and friends during childhood undated
Funeral program and obituary for Karin Virginia Oatman 2009
Photographs of Earl R. Oatman and Henry S. Winslow 2003
Photographs of Earl R. Oatman's family and family friends including brother Delmer Oatman, mother Ruby Oatman Gomez, and wife Karin Virginia Oatman 1897-1990, undated
Photographs of Earl R. Oatman, Karin Oatman, and the Fassoth family post World War II 1994-2008
Photographs of the Fassoth family including William, wife Catalina, and their son John undated
Announcement and invitation list regarding "Aztec Community Reunion" and city street maps of Omulgee and Henryetta, Oklahoma 1988-1994
Photographs of sites in and around Henryetta, Oklahoma, and Sylvester, Texas undated
Photographs (portraits) of Earl R. Oatman including his high school graduation 1939-1940
Funeral Program for Earl R. Oatman 2015
Arrowheads and pottery fragments (in display frame) collected by Earl R. Oatman undated