Books are shelved in general subject categories using the Library of Congress classification system. You may want to supplement your use of the catalog with browsing shelf areas for your topic.
G -- Geography (General)
GB 400-649 -- Geomorphology
GB 651-2998 -- Water, Hydrology
GC -- Oceanography
Q -- Science (General)
QC 851-999 -- Meteorology, Climatology
QK -- Botany
S -- Agriculture
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