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020 _a9788121927642
040 _aBD-DhJNU
_bENG
_cBD-DhJNU
_dBD-DhJNU
082 _223
_a363.7 AST
100 _aAsthana, D. K.
245 _aA textbook of environmental studies /
_cD. K. Asthana and Meera Asthana
260 _aNew Delhi :
_bS. Chand & Company,
_c2007.
300 _axvii, 460p. :
_bill. ;
_c24 cm
504 _aIncludes index
650 _aEnvironmental Science
700 _aAsthana, Meera
942 _2ddc
_cBK
_n0
999 _c2229
_d2229