1. Classical variational derivation and physical interpretation of Dirac's equation

   • B. H. Lavenda

   OriginalPaper Pages: 221 - 237

2. Tachyon kinematics and causality: A systematic thorough analysis of the tachyon causal paradoxes

   • Erasmo Recami

   OriginalPaper Pages: 239 - 296

3. Retroactive effects from measurements

   • C. W. Rietdijk

   OriginalPaper Pages: 297 - 311

4. Book review

   • Thomas E. Phipps Jr.

   BookReview Pages: 313 - 319

5. Book review

   • Leopold Halpern

   BookReview Pages: 321 - 327