- Mathematics Manual for Water and Wastewater Treatment Plant Operators: Wastewater Treatment Operations: Math Concepts and CalculationsSpellman, Frank R.
Hardcover (3rd ed) - Mathematics Manual for Water and Wastewater Treatment Plant Operators: Wastewater Treatment Operations: Math Concepts and CalculationsSpellman, Frank R.
Paperback (3rd ed) - Mathematics Manual for Water and Wastewater Treatment Plant Operators: Basic Mathematics for Water and Wastewater OperatorsSpellman, Frank R.
Hardcover (3rd ed) - Mathematics Manual for Water and Wastewater Treatment Plant Operators: Basic Mathematics for Water and Wastewater OperatorsSpellman, Frank R.
Paperback (3rd ed) - Mathematics Manual for Water and Wastewater Treatment Plant Operators: Water Treatment Operations: Math Concepts and CalculationsSpellman, Frank R.
Hardcover (3rd ed) - Mathematics Manual for Water and Wastewater Treatment Plant Operators: Water Treatment Operations: Math Concepts and CalculationsSpellman, Frank R.
Paperback (3rd ed) - Spellman's Standard Handbook for Wastewater Operators (3 Volume Set)Spellman, Frank R.
Hardcover (2nd ed) - Spellman's Standard Handbook for Wastewater Operators: Volume III, Advanced Level, Second EditionSpellman, Frank R.
Paperback (2nd ed) - Spellman's Standard Handbook for Wastewater Operators: Volume II, Intermediate Level, Second EditionSpellman, Frank R.
Paperback (2nd ed) - Spellman's Standard Handbook for Wastewater Operators: Volume I, Fundamental Level, Second EditionSpellman, Frank R.
Paperback (2nd ed) - Water and Wastewater Conveyance: Pumping, Hydraulics, Piping, and ValvesSpellman, Frank R.
Hardcover