333.7 Land, recreational and wilderness areas, energy
333.709 Environmental geography
333.70941 Environment--Great Britain 333.70973 Environment--United States de
333.7 Landflächen, Naturräume für Freizeit und Erholung, Naturreservate, Energie
333.709 Umweltgeografie
333.70941 Umwelt—Großbritannien 333.70973 Umwelt—USA, . . .
Dewey Decimal Classification
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