Chauhan, Avnish. Clean technologies and environmental protection / By Avnish Chauhan, S Sharma and P k Bharh. - 1st Ed. - New Delhi : DPH, 2015. - 380p. ; 00 cm. ISBN: 9789350567319 Subjects--Topical Terms: ENVIRONMENT -SOCIAL PROBLEM. Dewey Class. No.: 363.700954 / CLE