@book{
  author = "International Symposium on Lepton and Photon Interactions at High Energies, Gutbrod, F., International Union of Pure and Applied Physics",
  title = "Proceedings, 1977 International Symposium on Lepton and Photon Interactions at High Energies, Congress Centrum Hamburg August 25-31, 1977",
  year: 1977
  key = "Photonuclear reactions--Congresses",
  key = "Lepton interactions--Congresses",
  publisher = "Deutsches Elektronen-Synchrotron DESY",
  address = "Hamburg",
}