"United States Civil War Soldiers Index, 1861-1865," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FSY9-MTR : 4 December 2014), William A. Yakely, Private, Company B, 20th Regiment, Wisconsin Infantry, Union; citing NARA microfilm publication M559 (Washington D.C.: National Archives and Records Administration, n.d.), roll 33; FHL microfilm 882,518.