00822nam0-22002771i-450-990000994020403321000099402FED01000099402(Aleph)000099402FED0100009940220000920d1969----km-y0itay50------baengSemigroupsProceedings of a Symposium on Semigroups held at Wayne State University, Detroit, Michigan, June 27-29, 1968Edited by Karl W. FolleyNew YorkAcademic Press1969Teoria dei gruppiPrincipi di simmetria512Folley,Karl W.46867ITUNINARICAUNIMARCBK99000099402040332110A-1046888FI1FI1Semigroups354097UNINAING01