Kumar, P.S.G. . Introduction to Colon Classification / P.S.G.Kumar. - 7th ed / . - Nagpur : Dattsons , 1987. - xi,160p. : ill. ; 22cm . Includes index ISBN: NULL (Hbk) Subjects--Index Terms: CLASSIFICATION,COLON Dewey Class. No.: 025.435 / KUM/I