Measurement of and at photon energies up to 2.6 GeV
K.-H. Glander, J. Barth, W. Braun, J. Hannappel, N. Jöpen, F. Klein, E. Klempt, R. Lawall, J. Link, D. Menze, W. Neuerburg, M. Ostrick, E. Paul, I. Schulday, W. J. Schwille, H. v. Pee, F. W. Wieland, J. Wißkirchen and C. Wu