363.7 Environmental problems
363.73 Pollution
363.73091732 Urban pollution 363.731 Social causes 363.732 Incidence, extent, severity 363.735 Social action 363.7363 Environmental monitoring--pollution 363.737 Measures to prevent, protect against, limit effects of pollution 363.738 Pollutants 363.739 Pollution of specific environments
Dewey Decimal Classification
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