00436nam a2200169Ia 4500003000500000008004100005020001800046040001900064082000700083100002400090245004000114246003800154260004400192300001000236365000800246546001200254STCL230729s9999    xx            000 0 und d  a9788184885248  aSTCLcSTCLbEN  222  aTiwari, Vijay Kumar 2aA textbook of environmental studies  aTextbook of environmental studies  bHimalaya Publishing HouseaMumbaic2010  a432 p  b375  aEnglish