Mohank, Reena. Environmental resources and biological hazards / Reena Mohanka, Chowdhary Sharfuddin and M. P. Singh - New Delhi : A.P.H. Pub. Corp., c 2008. - x, 441 p. ; 23 cm. Bibliography : p. 420-441 47 47 ISBN: 978-81-313-0437-2 Subjects--Personal Names: Conrad, Joseph, Subjects--Topical Terms: Environmental degradation. Dewey Class. No.: 367.7287 / M71e