Sinha,Nishit K Sinha. Number System for the CAT Textual Documents By Nishit K Sinha - 2nd Edn--2015. - Delhi Pearson Education - 11.pg: ill,Answer &Explation; 23cm. ISBN: 9789332508125 Subjects--Index Terms: Reference Number System for the CAT G-Ref Almaree Dewey Class. No.: 511