Piaggio, H. T. H. (An) Elementary treatise on differential equations and their applications / by H. T. H. Piaggio. - 1st Indian ed. - Delhi : CBS publishers, 1985 - xv, 256p. ; 22x15cm. Includes answers. ISBN: : Rs.35 Subjects--Topical Terms: DIFFERENTIAL EQUATIONS Dewey Class. No.: 515.35 / PIA-ELE