Voluntary certification program for water works and water pollution control system operators in the State of Washington.

Bibliographic Details
Corporate Authors:	Washington (State). Division of Health, American Water Works Association. Pacific Northwest Section, Pacific Northwest Pollution Control Association
Format:	Book
Language:	English
Published:	[Olympia?], [publisher not identified] ; 1972.
Subjects:	Waterworks > Employees > Washington (State) > Certifications. Sewage disposal plants > Washington (State) > Officials and employees > Certification.

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