000 00337nam a2200145Ia 4500
008 131111s9999 xx 000 0 und d
100 _aYadav,K.
245 _aTeaching of life sciences
260 _aNew Delhi
260 _bAnmol
260 _c1993
300 _a282p.
650 _aEducation
_aTeaching-Life Science
763 _a15328
999 _c33054
_d33054