Wehr, M. Russell. Physics of the atom / M. Russell Wehr and James A. Richards. - 2nd ed. - London : Addision Wesley, c 1967. - xiii, 482 p. : ills. ; 24 cm. - Addison-wesley series in physics. . Includes index. 319 319 Subjects--Topical Terms: Physics. Dewey Class. No.: 539.7 / W424p