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National Biosolids Partnership 

National Manual of Good Practice 

Water Environment Research Foundation (WERF) Biosolids Knowledge Area

Proceedings of the Water Environment Federation
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Regional Biosolids Associations:

California Association of Sanitation Agencies (CASA) 

Mid-Atlantic Biosolids Association 

Northeast Biosolids and Residuals Association 

Northwest Biosolids Management Association 

Virginia Biosolids Council