00306nam a2200121Ia 450000500170000000800410001704100080005808200160006610000230008224500290010526000410013430000090017520260720174602.0260720s2005    xx            000 0 und d  aeng  a574.07 YADT  aYadav, Seema Singh  aTeaching of life science  aNew DelhibDominant Publishersc2005  a240p