DESY-02-013

is the collection of 4 preprints,

M. Erdmann:
Proton and photon structure.
hep-ex/0111052   (19 p.)

T. Carli:
Small-x QCD effects in particle collisions at high energies.
hep-ph/0111232   (31 p.)

G. Iacobucci:
Diffractive phenomena.
hep-ex/0111079   (26 p.)

U. Stösslein:
Polarized structure functions and spin physics.
hep-ex/0201036   (24 p.)