000 00313nam a2200133Ia 4500
005 20260205044626.0
008 260111s9999||||xx |||||||||||||| ||und||
082 _a371.5 C345T
100 _aCHADHA , P.C.
245 0 _aTEACHING OF SCIENCE
260 _aLUDHIANA
_bPARKASH
_c1979
300 _a324p.
942 _cBK
999 _c60494
_d60494