Cotter, C. H. (1966). The astronomical and mathematical foundations of geography. Hollis & Carter.
Lua i Stíl Chicago (17ú heag.)Cotter, Charles H. The Astronomical and Mathematical Foundations of Geography. London: Hollis & Carter, 1966.
Lua MLA (9ú heag.)Cotter, Charles H. The Astronomical and Mathematical Foundations of Geography. Hollis & Carter, 1966.
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