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Subclass GF
| GF1-900 | Human ecology. Anthropogeography | ||
| GF51 | Environmental influences on humans | ||
| GF75 | Human influences on the environment | ||
| GF101-127 | Settlements | ||
| GF125 | Cities. Urban geography | ||
| GF127 | Rural settlements. Rural geography | ||
| GF500-900 | By region or country | ||
