Sjedinjene Države, Zona Panamskog kanala, Zapisi o zaposlenju i popisi plovidbe, 1905.-1937.

"United States, Panama Canal Zone, Employment Records and Sailing lists, 1905-1937." Database with images. FamilySearch. http://FamilySearch.org : 8 December 2025. Citing NARA record group 185. National Personnel Records Center, St. Louis, Missouri.