Clifford, A. H. G. B. Preston creator text Rhode Island American Mathematical Society 2010 monographic 2 v, various pages : ill. ; 22 cm. Includes bibliographical references and index Vol-1: xv, 224 (1977) Vol-2: xv, 352 (2010) Group theory Transmission semigroups Inverse semigroups Finite elements Finite sets Semigroups FBSH 512.86 CLI 0821802712 (pbk) 9780821802724 (pbk)