Richtmyer, Floyd Karter. Introduction to modern physics / Floyd Karter Richtmyer and Earle Hesse Kennard. - 4th ed. - London : McGraw-hill book company, c 1954. - xvii, 759 p. : ill. ; 26 cm. - International series in pure and applied physics. . Include index. 340 340 Subjects--Topical Terms: Modern physics. Dewey Class. No.: 539.7 / R419i