Heitler, W. The quantum theory of radiation / by W. Heitler - 3rd ed. - Oxford : The Clarendon Press , 1960 . - 430 p. Hard Back - The international series of monographs on physics / . Subjects--Topical Terms: Classical theory of radiationQuantum theoryElectron field Dewey Class. No.: 535.15 / HEI-Q