00427    a2200145   4500082001600000100001900016245006000035260004900095300001600144440003000160650001200190650004500202700001800247700001600265  a577.09bTRI  aTrivedy, R. K.  aPractical methods in ecology and environmental sciences  aKaradbEnviro media publicationsc1987g1987  a340p.c24cm  aSeries in methodology - 2  aEcology  aHistorical, geographic persons treatment  aTrisal, C. L.  aGoel, P. K.