Spojené státy, Přechody hranic z Kanady do Spojených států, 1894–1954

"United States, Border Crossings from Canada to United States, 1894-1954." Database. FamilySearch. https://FamilySearch.org : 22 April 2025. Citing NARA microfilm publications A3445, A3450, A3451, A3478, and A3480. Washington, D.C.: National Archives and Records Administration, n.d.