628.16 Testing, analysis, treatment, pollution countermeasures
628.168 Pollution countermeasures
628.1682 Countermeasures for domestic wastes and sewage 628.1683 Countermeasures for industrial wastes 628.1684 Countermeasures for agricultural wastes 628.1685 Countermeasures for radioactive wastes
Dewey Decimal Classification
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