Spellman's standard handbook for wastewater operators - Spellman, Frank R. (Boca Raton : CRC Press, 2011)
v. 1. Fundamental level -- v. 2. Intermediate level -- v. 3. Advanced level.
Includes bibliographical references and indexes.
Keywords: Sewage disposal -- Employees -- Certification -- United States -- Handbooks, manuals, etc; Sewage disposal plants -- United States -- Handbooks, manuals, etc