Barut, A. O. The theory of the scattering matrix : for the interactions of fundamental particles / A. O. Barut. - New York : Macmillan, c 1967. - xiv, 350 p. : ills., figs. ; 24 cm. Includes index. 48 48 Subjects--Topical Terms: S-matrix theory Dewey Class. No.: 530.12 / B288t