000 00344nam a2200145Ia 4500
008 131111s9999 xx 000 0 und d
100 _aVyas,Harishchandra
245 _aParyavaran shiksha
260 _aNew Delhi
260 _bVidya Vihar
260 _c1998
300 _a288p.
650 _aHindi
_aEnvironmental education
763 _a20481
999 _c47531
_d47531