Advanced Waste Treatment	AWWA Wastewater Field Guide	Basic Chemistry For Water And Wastewater Operators
Basic Science Concepts And Applications For Wastewater	Biological Wastewater Treatment	Design Of Municipal Wastewater Treatment Plants - Vol 1
Design Of Municipal Wastewater Treatment Plants - Vol 2	Design Of Municipal Wastewater Treatment Plants - Vol 3	Math For Wastewater Treatment Operators Grades 1 & 2