Richtmyer, F. K. Introduction to modern physics / by F. K. Richtmyer ; E.H. Kennard, T. Lauritsen - 5th ed. - New York : McGraw-Hill, c1955 - xv, 666 p. ; ill. ; 24 cm. Includes Index Subjects--Topical Terms: Physics. Dewey Class. No.: 530 / RII 1955