New Trends in HERA Physics 1999 Proceedings of the Ringberg Workshop Held at Tegernsee, Germany, 30 May - 4 June 1999 - Grindhammer, G.; Grindhammer, G.; Kniehl, B.A; Kniehl, B.A; Kramer, G.; Kramer, G. (Springer Berlin Heidelberg : Imprint: Springer, 2000)