TY - BOOK AU - Culp Gordon L. AU - Culp Russell L TI - New concepts in water purification SN - 0-442-21781-1 U1 - 628.16 PY - 1974/// CY - New york PB - Van nostrand KW - Wast-Water supply source KW - Water-Filteration KW - Water-Purification N1 - Includes bibligrophical referencea and index ER -