Kapoor, L. Hari Das HPJ Kapoor's interest calculator / by L. Hari Das Kapoor - 23rd rev.ed. - Delhi : H. P. J. Kapoor, [n.d.] - 236 p. ; 26 cm. ISBN: Rs. 10.00 Subjects--Topical Terms: Calculators Dewey Class. No.: 511.8083