00682nam0-22002531i-450-990001141770403321000114177FED01000114177(Aleph)000114177FED0100011417720000920d1947----km-y0itay50------baengNon-euclidean geometryby CoxeterTorontoUniversity of Toronto Press1947Mathematical expositionsCoxeter,H.S.M.41090ITUNINARICAUNIMARCBK99000114177040332118-A-2s.i.MA1MA1Non-euclidean geometry344153UNINAING01