1. On the covariant structure of the two-point function

   • A. I. Oksak
   • I. T. Todorov

   OriginalPaper Pages: 271 - 304

2. On the implementability of automorphism groups

   • H. J. Borchers

   OriginalPaper Pages: 305 - 314

3. A remark concerning the charge operator in quantum electrodynamics

   • Helmut Reeh

   OriginalPaper Pages: 315 - 325

4. A particular non-atomistic orthomodular poset

   • R. J. Greechie

   OriginalPaper Pages: 326 - 328

5. Global aspects of the Cauchy problem in general relativity

   • Yvonne Choquet-Bruhat
   • Robert Geroch

   OriginalPaper Pages: 329 - 335

6. A Gårding domain for quantum fields

   • Michael C. Reed

   OriginalPaper Pages: 336 - 346