00603nam2 22002171i 450 990002274750403321000227475FED01000227475(Aleph)000227475FED0100022747520030801d--------km-y0itay50------baSome unresolved problems. London,. 1954,p. 204-216.001000221614Albert,Adrien44251ITUNINARICAUNIMARCBK990002274750403321FFABCSome unresolved problems. London,. 1954,p. 204-216384959UNINAING01