1. Points invariants dans le produit de quatre inversions de centres non coplanaires

   • Gaston Casanova

   Papers Pages: 79 - 84

2. Deformations of the algebra of abstract vector variables

   • F. Sommen

   Papers Pages: 85 - 90

3. Clifford algebras and geometric algebra

   • G. Aragón
   • J. L. Aragón
   • M. A. Rodríguez

   Papers Pages: 91 - 102

4. Spin invariants of multivectors

   • J. G. Maks

   Papers Pages: 103 - 111

5. Hurwitz duality theorems for Fueter and Firac equations

   • Julian Lawrynowicz
   • Osamu Suzuki

   Papers Pages: 113 - 132

6. The cross ratio and Clifford algebras

   • Jan Cieśliński

   Papers Pages: 133 - 139

7. Equations of motion for spinning massive particles over twistor fields

   • Jaime Keller
   • Robert M. Yamaleev

   Papers Pages: 141 - 166

8. Clifford algebra in classical electrodynamical hydrogen atom model

   • V. M. Simulik
   • I. Yu. Krivsky

   Erratum Pages: 167 - 168

9. Announcement of future meetings on Clifford Algebras

   Announcement Pages: 169 - 170

10. Hermann Gunther Grassman (1809–1877) Visionary Mathematician, Scientist and Neohumanist Scholar. Papers from a Sesquicentennial Conference Editor: Gert Schubring

    Book Review Pages: 171 - 172