00633nam a22001937a 4500 BD-DhUL 20150113114141.0 150113b ii a|||| |||| 001 0 eng d BD-DhUL BD-DhUL 23 628.16836 PUC Purohit, S K Chemical and biological methods of water and air pollution control : a practical hygiene manual / S K Purohit Bikaner : Agro Botanical, c1985. vi, 56 p. : ill. ; 18 cm. Rs 35.00 Includes bibliographical references and index. water and air pollution ddc BK 30180 30180 0 0 ddc 0 628_168360000000000_PUC 0 NFIC 57169 DUSL DUSL GEN 1989-01-10 purchase 628.16836 PUC 311709 2015-01-13 1 2015-01-13 BK