Não informado. (2012). The Bulletin of the Society of Cartographers. Society of Cartographers.
Lua i Stíl Chicago (17ú heag.)Não informado. The Bulletin of the Society of Cartographers. Middlesex, Inglaterra: Society of Cartographers, 2012.
Lua MLA (8ú heag.)Não informado. The Bulletin of the Society of Cartographers. Society of Cartographers, 2012.
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