1. Tunable coherent light sources

   • J. Kuhl
   • W. Schmidt

   Invited Paper Pages: 251 - 270

2. A simple positron lifetime system suitable for low density gases

   • P. G. Coleman
   • T. C. Griffith
   • T. L. Killeen

   Contributed Papers Pages: 271 - 273

3. Controlled gold doping of silicon by using ion implantation

   • M. Schulz
   • A. Goetzberger
   • W. Langheinrich

   Contributed Papers Pages: 275 - 280

4. Positron scattering on helium, neon and argon above 4 eV

   • B. Jaduszliwer
   • D. A. L. Paul

   Contributed Papers Pages: 281 - 284

5. Thermoelectric temperature measurements in laser pulsed heating of metals

   • C. Bar-Isaac
   • U. Korn
   • S. Shtrikman

   Contributed Papers Pages: 285 - 290

6. Influence of the sum frequency on optically pumped parametric amplifiers

   • Hans Haldemann

   Contributed Papers Pages: 291 - 298

7. Hydrostatic pressure-forced phase transition from ferroelectric to antiferroelectric in compositions of the PbZr_1−x Ti _x O₃+0.8% WO₃ type

   • Paul Gonnard
   • François Bauer
   • Lucien Eyraud

   Contributed Papers Pages: 299 - 305

8. MAPW calculation of the anisotropic positron annihilation in copper

   • H. Bross
   • H. Stöhr

   Contributed Papers Pages: 307 - 311

9. Ein vollständig automatisiertes Meßverfahren zur Bestimmung der magnetischen Nachwirkung in ferromagnetischen Kristallen

   • F. Walz

   Contributed Papers Pages: 313 - 319

10. Damage dependent electrical activation of boron implanted silicon

    • H. Ryssel
    • H. Müller
    • K. Schmid

    Contributed Papers Pages: 321 - 324

11. A study of the effects of deuteride precipitation in tantalum by frequency and internal friction measurements

    • G. Cannelli
    • R. Cantelli

    Contributed Papers Pages: 325 - 333

12. Forthcoming papers

    Abstract Pages: A335 - A338

13. Book reviews

    • A. E. Siegman
    • S. Grossmann
    • H. Sonnenberg

    BookReview Pages: A339 - A342