1. Spin glasses models and typical properties

   • G. Heber

   Invited Paper Pages: 101 - 110

2. The investigation of ion implanted layers by scanning electron microscopy

   • W. Rothemund
   • C. R. Fritzche

   Contributed Papers Pages: 111 - 119

3. Temperature dependence of positron annihilation parameters in solid gallium

   • D. Segers
   • C. Dauwe
   • L. Dorikens-Vanpraet

   Contributed Papers Pages: 121 - 123

4. Expansion of laser sparks produced by a mode-locked Nd: Glass-laser

   • I. Meyer
   • P. Stritzke

   Contributed Papers Pages: 125 - 128

5. Time-dependent propagation of high energy laser beams through the atmosphere

   • J. A. Fleck Jr.
   • J. R. Morris
   • M. D. Feit

   Contributed Papers Pages: 129 - 160

6. The influence of external tensile stress on surface elastic waves on piezoelectric ceramic plates

   • Kohji Toda

   Contributed Papers Pages: 161 - 163

7. Higher-order wave interactions in a periodic medium

   • S. R. Seshadri

   Contributed Papers Pages: 165 - 173

8. Determination of cation distribution in Ti⁴⁺ and Co²⁺ substituted barium ferrite by Mössbauer spectroscopy

   • E. Kreber
   • U. Gonser

   Contributed Papers Pages: 175 - 180

9. The influence of deep levels on the temperature coefficient of ion-implanted resistive layers in silicon

   • H. Runge
   • E. F. Krimmel

   Contributed Papers Pages: 181 - 185

10. Frequencies of some optically pumped submillimetre laser lines

    • G. Kramer
    • C. O. Weiss

    Letter Paper Pages: 187 - 188

11. Forthcoming papers

    Announcement Pages: A189 - A193

12. Book reviews

    • K. K. Mei
    • H. C. Wolf
    • K. -D. Becker

    BookReview Pages: 194 - 195