Amaranath, T. An elementary course in partial differential equations [Book] / T. Amaranath. - 2nd ed., North American ed. - Delhi : Narosa Pub. House, c1997. - viii, 156 p. : ill. ; 24 cm. All. ISBN: 8173195196 Subjects--Topical Terms: Differential equations, Partial. Dewey Class. No.: 515.353