000 00253nam a2200109Ia 4500
100 _aWelsz Paul B
250 _aEdn 4
245 _aScience of Biology .-Edn 4
260 _bTata McGraw-Hill, N'Delhi
082 _aG/N89/B17922
300 _app 6158; 24*21
999 _c20321
_d20321