1. Intersections of Steiner systemss(3,4,v) withv=5·2 ⁿ

   • Mario Gionfriddo

   OriginalPaper Pages: 103 - 111

2. Zur Kinematik der isotropen Ebene II

   • Otto Röschel

   OriginalPaper Pages: 112 - 122

3. A sphere as a surface which contains many circles

   • Nobuko Takeuchi

   OriginalPaper Pages: 123 - 130

4. The characteristic mapping of a reflector

   • Thomas Hasanis
   • Dimitri Koutroufiotis

   OriginalPaper Pages: 131 - 167

5. The non-existence of an oval-extendable (56, 11, 2) design

   • Edward F. Assmus Jr.

   OriginalPaper Pages: 168 - 174

6. Near-rings associated with generalized translation structures

   • Carlton J. Maxson

   OriginalPaper Pages: 175 - 193

7. A note on finite semifield planes that admit affine homologies

   • Vikram Jha
   • Norman L. Johnson

   OriginalPaper Pages: 194 - 197

8. Criteria for unique metric lines

   • Raymond W. Freese
   • Edward Z. Andalafte

   OriginalPaper Pages: 198 - 201