γγ Collisions [electronic resource] : Proceedings of the International Workshop (Journées d'Etudes Internationales) Held at Amiens, France, April 8–12, 1980 / edited by Gérard Cochard, Paul Kessler.

General introduction -- The early experiments on photon-photon collisions -- Tagging and constraints in ?? experiments -- 2? Physics versus 1? physics and whatever lies in between -- Results on two-photon interactions from Mark II at spear -- Outlook for studies of Gamma-Gamma collisions at PEP -- Two photon physics in the pluto detector -- Two photon results from TASSO -- 2? processes with the MARK-J detector at PETRA -- Present status of JADE's ??-physics analysis -- The small angle tagging system of CELLO -- Back-factorization procedures -- Radiative corrections to ? ? processes in e+e? ,e? e+e+collision rings -- ?, ? Physics at D.C.I. -- Evidence for 2? processes at the ISR -- Two photon physics at LEP, problems and possibilities -- Particle pair production in two-photon reactions -- ?? hadrons at low energies -- Two-photon collisions and QCD -- Photon-photon physics in the deep inelastic region -- Trends in particle physics -- Summary and concluding remarks -- Abstracts of short contributions presented in parallel sessions (theory).