Hohler, G. Photon-Hadron interaction I : International summer institute in theoretical physics / by G. Hohler - New York: Springer Verlag, 1972. - 147p. - Springer tracts in modern physics ; 62 . ISBN: 3540057579 Subjects--Topical Terms: Commutator matrixElectromagneticPhysicsVirtual photons Dewey Class. No.: 539.72 / HOH/P