000
00253nam a2200109Ia 4500
100
_a
Welsz Paul B
250
_a
Edn 4
245
_a
Science of Biology .-Edn 4
260
_b
Tata McGraw-Hill, N'Delhi
082
_a
G/N89/B17922
300
_a
pp 6158; 24*21
999
_c
20321
_d
20321