00357nam a2200121 a 450000500170000002000150001708200160003210000350004824500410008326000430012430000240016749000440019120251203110612.0  a8185931135  a512.21bNOT  aBhattacharjee,Meenaxi [et al.]  anotes on infinite permutation groups  aNew DelhibHindustan book agencyc1997  axi,202p.c20cm.cHB  aTexts and readings in Mathematics No.12