1. I. Abt et al. (Hl Collab.), Nucl. Instr. and Meth. A386 (1997) 310 and A386 (1997) 348.
2. ZEUS Collab., The ZEUS Detector, Status Report (1993).
3. K. Ackerstaff et al. (HERMES Collab.), Nucl. Instrum. Meth. A417 (1998) 265.
4. P. Mulders, these proceedings.
5. A. Mueller, these proceedings.