Ricardo, Henry. A modern introduction to differential equations / Henry J. Ricardo. - 2nd ed. - Amsterdam ; Boston : Academic Press/Elsevier, c2009. - xv, 518 p. : ill. ; 25 cm. Includes bibliographical references and index. ISBN: 9780123747464 (hardcover : alk. paper) 0123747465 (hardcover : alk. paper) LCCN: 2008050079 Subjects--Topical Terms: Differential equations. LC Class. No.: QA371 / .R357 2009 Dewey Class. No.: 515.35 / RHD