MUEHRCKE, P. (1972). Thematic cartography. Association of American geographers.
Chicago-viite (17. p.)MUEHRCKE, Phillip. Thematic Cartography. Washington: Association of American geographers, 1972.
MLA-viite (9. p.)MUEHRCKE, Phillip. Thematic Cartography. Association of American geographers, 1972.
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