000 00356nam a2200121Ia 4500
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082 _a570
245 _aBiological Abstract Vol 52
_c;
246 _aBiological Abstract Vol 52
260 _aPhiladelphia
_bBiosciences Information Services of B.A.
_cJun-71
650 _aBiological Abstract
999 _c46339
_d46339