Hardcover textbook: PARTIAL DIFFERENTIAL EQUATIONS: An Introduction by Eutiquio C. Young, Allyn and Bacon, Inc., Copyright 1972. Green cloth hardcover with gold foil lettering on spine, Library of Congress Catalog Card Number 70-166551. Good condition: moderate shelf wear and light scuffing to cloth boards and edges, gilt lettering remains readable, corners slightly bumped; binding is solid and all pages are present and intact with light age-toning but no major tears or markings. This is a complete single-volume textbook (hardcover) suitable for collectors or as a working reference. Approximate size for shipping: 9.5 x 7.5 x 1.25 inches; shipping weight approx. 2 lb 8 oz. See photos for cover and title page details.