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Geography is covered with the G call numbers.
G | Geography (general). Atlases. Maps
GA | Mathematical geography
GB | Physical geography
GC | Oceanography
GE | Environmental Science
GF | Human ecology. Anthropogeography
GN | Anthropology
GR | Folklore
GT | Manners and customs
GV | Recreation
Due to the varied geography sub disciplines, many other call numbers will provide some books of potential interest as well. For more details on geography and the other disciplines in the G call numbers, please check out PDF of the Library of Congress' guide to geography, anthropology and recreation.