Clark, Fred E.
Marketing agricultural products in the United States
Macmillan, 1933
 Buku Teks
Road atlas : United States, Canada and Mexico / [s.n]
Rand McNally, [date of publication not identified]
 Buku Referensi
Neighbors taken for granted canada and the united states
Frederick A. Praeger, 1966
 Buku Teks SO
Directory of German studies : departments, programs, and faculties in the United States and Canada 1990
edited by. Valters Nollendorfs and Geoffrey S. Koby
German Studies Information, 1991
 Buku Referensi
Petrides, George A.
A field guide to eastern trees : eastern United States and Canada
Houghton Mifflin, 1988
 Buku Teks