000 00286nam a2200121Ia 4500
008 200701s1983 xx 000 0 eng d
100 _aVERMA. P.S
245 0 _aENVIROMENTAL BIOLOGY PRINCIPLES OF ECOLOGY
250 _a1st
260 _bS CHAND
_c1983
300 _a591
942 _2ddc
_cGE
999 _c2884
_d2884