1. Okubo second-order mass formula fromSO(6,1)

   • W. Tait

   OriginalPaper Pages: 3 - 7

2. Quantum field theory of fermions constructed from bosons. Generalization to Para-Fermi statistics

   • A. J. Kálnay
   • E. Mac Cotrina
   • K. V. Kademova

   OriginalPaper Pages: 9 - 24

3. Einstein-Maxwell null fields with non-zero twist

   • P. A. Goodinson
   • R. A. Newing

   OriginalPaper Pages: 25 - 30

4. The positivity conditions in general relativity

   • J. N. Goldberg
   • F. S. Klotz

   OriginalPaper Pages: 31 - 38

5. Galilean invariance and magnetic monopoles

   • H. Bacry
   • J. Kubar-Andre

   OriginalPaper Pages: 39 - 47

6. Irreducible representations of a parafield and the connection of the parafield with usual fields

   • A. B. Govorkov

   OriginalPaper Pages: 49 - 66

7. Algebraical comparison of classical and quantum polynomial observables

   • Hans Tilgner

   OriginalPaper Pages: 67 - 75

8. Erratum: Observer theories based on Stueckelberg equations of motion

   • Robert G. Cawley

   Erratum Pages: 77 - 78