TY  - BOOK
AU  - Tesh, Ken.
TI  - Practice Exams: Water distribution operator certification 
SN  - 9781547207121
AV  - TD 380 .T47 2017 
PY  - 2017///
CY  - [Place of publication not identifed]
PB  - [publisher not identified]
KW  - WASTEWATER
N1  - Exams :, Practice; Includes bibliographical references
N2  - This book is for anyone studying for the Grade 2 Water Distribution Operation Certification Exam. It's intended for newer operators. Grade 2 refers to the second certification level from the bottom
ER  -