Oklahoma, Seznamy posádek plavidel přijíždějících do Manitowocu, 1925–1956

"Wisconsin, Crew Lists of Vessels Arriving at Manitowoc, 1925-1956." Database with images. FamilySearch. http://FamilySearch.org : 14 June 2024. Citing NARA microfilm publication M2045. Washington, D.C.: National Archives and Records Administration, n.d.