Não informado. (1944). Surveying and mapping. American Congress on Surveying and Mapping.
Lua i Stíl Chicago (17ú heag.)Não informado. Surveying and Mapping. Washington: American Congress on Surveying and Mapping, 1944.
Lua MLA (8ú heag.)Não informado. Surveying and Mapping. American Congress on Surveying and Mapping, 1944.
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