Morse, Philip McCord Methods of theoretical physics [by] Philip M. Morse [and] Herman Feshbach. - New York McGraw-Hill 1953. - 2 v. illus. 24 cm. - International series in pure and applied physics . LCCN: 52011515 /L/r54 Subjects--Topical Terms: Mathematical physics LC Class. No.: QC20 / .M6 Dewey Class. No.: 530.151