History of the Sixteenth battery of Ohio volunteer light artillery, U. S. A., from enlistment, August 20, 1861, to muster out, August 2, 1865by Ohio artillery. 16th battery, 1861-1865.1906
History Of The Twenty-First Regiment, Massachusetts Volunteers, In The War For The Preservation Of The Union, 1861-1865by Charles F. Walcott1882