Letters of Florian Giauque, 102 OVI, in Giauque Family Papers, MsC 110, Special Collections, University of Iowa (letters discussing army life and fellow acquaintances)

Letters of Major Jonas D. Elliott to Wife, 1862-1864, Civil War Miscellaneous Collection, U. S. Army Military History Institute, Carlisle Barracks

Six letters of Benjamin Franklin Wade, 102 OVI, 1863-65, VFM 2181, Ohio Historical Society

Ohio Historical Society also has some published material on the 102nd.