00663nam0-22002531i-450-990001138450403321000113845FED01000113845(Aleph)000113845FED0100011384520000920d1968----km-y0itay50------baengCosmologydi BondiCambridgeCambridge University Press1968Cambridge monographs on physicsBondi,Hermann40366ITUNINARICAUNIMARCBK99000113845040332129-L-1011068MA1MA1Cosmology186976UNINAING01