000 00351nam a22001457a 4500
082 _aH 333.7
_bUSH/P
100 _aUsha Khurana
245 _aParyavaran siksha/
_cby Usha Khurana
260 _aNew Delhi:
_bThakshasila,
_c1994.
300 _a55p.
650 _aEnvironmental Science
650 _aEconomics
650 _aSocial Sciences
942 _cBK
999 _c58602
_d58602