Richtmyer, F. K. ( 1881-1939 ). Introduction to modern physics, by F. K. Richtmyer and E. H. Kennard. - 4th ed. - New York, McGraw-Hill Book Co., 1947. - xvii, 759 p. illus., ports. 24 cm. - International series in pure and applied physics . LCCN: 48005157 Subjects--Topical Terms: FÍSICA Dewey Class. No.: 530