Classification
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361 - Social problems & social welfare in general
1
394 - General customs
1
395 - Etiquette (Manners)
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
659 - Advertising & public relations
1
796 - Athletic & outdoor sports & games
1
809 - History, description & criticism
1