TY - GEN AU - Spellman,Frank R. TI - Water treatment operations: math concepts and calculations T2 - Mathematics manual for water and wastewater treatment plant operators SN - 9781482224214 (pbk.) AV - TD430 .S64 2014 U1 - 628.10151 PY - 2014/// CY - Boca Raton PB - Taylor & Francis KW - Water quality management KW - Problems, exercises, etc KW - Mathematics KW - Water KW - Purification N1 - Includes references & index ER -