Gerard P. Schreder

Opacity of the Universe to High-Energy Photons

R. Gould, Robert J. Gould, Gerard P. Schreder, 1966 .

Opacity of the Universe to High-Energy Photons

R. Gould, Robert J. Gould, Gerard P. Schreder, 1966 .

Pair production in photon-photon collisions.

R. Gould, Robert J. Gould, Gerard P. Schreder, 1967 .