00503 a2200181 4500 577.09 TRI 20465 31733 Trivedy, R. K. Practical methods in ecology and environmental sciences Karad Enviro media publications 1987 1987 340p. 24cm Series in methodology - 2 Ecology Historical, geographic persons treatment Trisal, C. L. Goel, P. K. L 48083 48083 0 0 0 0 LEN MKDL MKDL LEN 2009-07-23 0 577.09TRI 55570 2009-07-23 00:00:00 0.00 2016-10-31 L