00774    a2200385   4500000002100000001000700021005001700028008004100045010000500086020001800091082001600109100002500125110000500150245006200155250000500217260003900222300000900261490000700270500000500277600000500282610000500287611000500292630002400297650000500321651000500326654000500331700000900336710000900345711000500354720000500359730000500364740000500369752000500374856000900379BKB                 14581320200902171015.0                                          a  a9788184870947  a363.7bT32T1 aThatheyus, A. Joseph  a1 aTextbook of environmental studiescby A. Joseph Thatheyus  a  aNew DelhibNarosa Publishingc2011  av.p.  av  a  a  a  a  aEnvironment science  a  a  a  abc  abc  a  a  a  a  a  adf