000 00435nam a2200145Ia 4500
008 190328s9999||||xx |||||||||||||| ||und||
040 _aNITIL
_cNITIL
082 _221st
_a574.52607
_bV996P
100 _aVyas, Harish Chandra
245 0 _aParyavaran shiksha
_cHarish Chandra Vyas
260 _aNew Delhi
_bVidya Vihar
_c1992
300 _a288p.
650 _aEnvironmental education; Ecology; Air-Pollution; Water-Pollution
942 _cBKS
999 _c9978
_d9978