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WEF Wastewater Treatment Plant Reference Guide
116.14
WEF Biosolids Land Appliers’ Guide to Preparing for the Certification Examination Reference Guide
146.35
WEF Collection Systems Operators’ Guide to Preparing for the Certification Examination Reference Guide
104.99
WEF Contemporary Technologies for Shale-Gas Water and Environmental Management Reference Guide
126.24
146.44
0.0
WEF Wastewater Reference Guide
111.09
WEF Third Century of Biochemical Oxygen Demand Reference Guide
56.55
WEF Engineers, Public Health Officials, Scientists, Utility and Collection Systems Managers Reference Guide
139.37
WEF Clean Water Act, 25th Anniversary Reference Guide
171.69
WEF Consultants and Wastewater Reference Guide
136.35
WEF Utility Reference Guide
106.04
WEF Pumping Stations Reference Guide
75.75
WEF Water Resource Recovery Facilities Reference Guide
WEF Stormwater Management Reference Guide
127.26
WEF Facility Owners and Practitioners Reference Guide
149.47