00290    a2200109   4500082001600000100001700016245005800033260003400091300001600125650001200141650002700153  a577.07bGUP  aGupta, P. K.  aMethods in environmental analysis water, soil and air  aJodhpurbAgrobiosc2000g2000  a410p.c22cm  aEcology  aLife sciences  Biology