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