Autor
Reino Unido. Admiralty. Hidrographic Oficce
10
American Geographical Society of New York
7
Reino Unido. Admiralty. Hydrographic Office
6
War College Division General Staff
2
Bernhardson, Wayne
1
Estados Unidos. Office of Strategic Services
1
Hobbs, J.S. Dibujo
1
Imray, James Frederick
1
U.S . Consular Districts and Foreign Service Posts
1