000 00263cam a22000977a 4500
008 180718b1991 xxu||||| |||| 00| 0 eng d
100 _aBisht, Sujata
245 _aParyavaran shiksha (Hindi)
_cby Sujata Bisht
260 _aNew Delhi
_bTakshila
_c1991
300 _a119p.
999 _c405762
_d405762