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WEF Biosolids Land Appliers’ Guide to Preparing for the Certification Examination Reference Guide
146.35
AWWA Wastewater Microbiology: A Handbook for Operators Reference Guide
140.39
WEF Wastewater Treatment Plant Reference Guide
0.0
AWWA Basic Science Concepts and Applications for Wastewater Student Workbook Reference Guide
99.99
ACRP Wastewater Reference Guide
66.66
WEF Design Engineers, Plant Managers and Regulators Reference Guide
171.69
42.93
WEF Wastewater and Water Reference Guide
151.49
WEF Nutrient Removal Reference Guide
181.79
WEF Facility Owners and Practitioners Reference Guide
149.47
18.18
111.09
AWWA Basic Chemistry for Water & Wastewater Operators Reference Guide
96.96
WEF Wastewater Reference Guide
106.04
WEF Belt Press Reference Guide
94.93
WEF Sludge Process Reference Guide
CSUS Wastewater Reference Guide
144.28
CSUS Wastewater
ACRP Waterworks Reference Guide
19.19
WEF Water Resource Recovery Facilities Reference Guide
139.37