00631nam2 22002171i 450 990002274570403321000227457FED01000227457(Aleph)000227457FED0100022745720030801d--------km-y0itay50------ba<<The >>biological effects of 8-azapurines.London, 1957, p. 270-282.001000221616Matthews,R.E.F.64732ITUNINARICAUNIMARCBK990002274570403321FFABCBiological effects of 8-azapurines.London, 1957, p. 270-282385182UNINAING01