Morse, Philip M. Methods of theoretical physics / Philip M. Morse and Herman Feshbach. - New York : McGraw-Hill, 1953. - Parts : 24 cm. - International series in pure and applied physics. . Includes Index. Bibliography : p. 1938. P. 2- chapters 9 to 13 ; 337 337 Subjects--Topical Terms: Physics--theory. Dewey Class. No.: 530.01 / M838m