Ross, Shepely L. . Differential equations / Shepely L. Ross. - 3rd ed / . - New York : John Wiley , 1984. - vii,807p : ill,figs,tables ; 23cm . - Pt.1- NULL ISBN: 0471032948 USD6.50 Subjects--Index Terms: DIFFERENTIAL EQUATIONS Dewey Class. No.: 515.35 / ROS/D