Willmore, T. J. An introduction to differential geometry / T. J. Willmore. - London : Oxford University Press, c 1964. - x, 317 p. : ill. ; 21 cm. - E. L. B. S. textbook series. . Includes index. 333 333 Subjects--Topical Terms: Differential geometry. Dewey Class. No.: 516.7 / W682i