Widder, David V. Advanced calculus / David V. Widder. - 2d ed. Eastern economy ed. - New Delhi: PHI Learning, c1961. - xvi, 520 p.: illus. 22 cm. Includes index English LCCN: 64018399 Subjects--Topical Terms: Calculus.Mathematical analysis. LC Class. No.: QA303 / .B917 1965 Dewey Class. No.: 517/WIA