Sen, . Premire guide to W.B.C.School service commission examination 2012 : commerce / Sen and Sundaram. - / . - Kolkata : Teachers Book Concerns , 2012. - 341p. : ill.,table ; 21cm . NULL ISBN: RS130.00 (pbk) Subjects--Index Terms: COMMERCE-GUIDE BOOK Dewey Class. No.: 380.1076 / SEN/P