00618nam a22002171 4500 1/13512 980924s1976 enk 001 0eng d 0582441803 13970 DLC GR-PeUP 512.2 LE Ledermann, W. Introduction to group theory/ W. Ledermann. London: Longman, 1976. 176p.; 21cm. Index. Bibliography. Group theory Congresses. Representations of groups. Semigroups. INST UNIPILB MAIN 20040709 512.2 LE 00112246 00112246 LOAN 0 1