000 00259nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aYadav, R.P.
245 0 _aLearn And Teach Biology
260 _aDelhi
_bAuthorspress
_c2005
300 _a162p.
942 _cBK
999 _c13685
_d13685