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Secondary treatment

https://www.wikidata.org/wiki/Q22908586

Field Hierarchy

Parent
Medicine 49.7M papers	Engineering 24.7M papers	Internal medicine 21.2M papers	Environmental science 8.1M papers
Surgery 7.7M papers	Waste management 1.6M papers	Environmental engineering 976k papers	Wastewater 249k papers
Sewage treatment 119k papers		Effluent 106k papers
Current
Secondary treatment 801 papers
Child

Trends

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History