000 00328nam a2200145Ia 4500
008 221121s9999 xx 000 0 und d
041 _aENGLISH
082 _bSIN
100 _aSINGH,S.K.
245 0 _aTEACHING AND ENVIONMENTAL SCIENCE
260 _bAPH PUBLICATION
300 _a366
650 _aPEDAGOGY
942 _cREF
999 _c177679
_d177679