1. Titles of forthcoming papers

   Legacy Pages: iii - iii

2. Axial and radial ion movement in the plasma of an ion laser

   • K. Barthel
   • J. Boscher
   • G. Schäfer

   Erratum Pages: iii - iii

3. Spectral Theory of Diffraction

   • R. Mittra
   • Y. Rahmat-Samii
   • W. L. Ko

   Invited Paper Pages: 1 - 13

4. Spectral considerations in the laser isotope separation of Uranium Hexafluoride

   • J. W. Eerkens

   Contributed Papers Pages: 15 - 31

5. Anomalous plasma diffusion transverse to high magnetic fields in InSb

   • H. Bruhns
   • K. Hübner
   • W. Schneider

   Contributed Papers Pages: 33 - 39

6. Index modulation and spatial harmonic generation in dichromated gelatin films

   • S. K. Case
   • R. Alferness

   Contributed Papers Pages: 41 - 51

7. Electromagnetic field representation in the source region

   • A. Mohsen

   Contributed Papers Pages: 53 - 55

8. Zone melting of binary alloys with compositions near an eutectic or peritectic

   • G. Zerweck

   Contributed Papers Pages: 57 - 66

9. The formation of positronium in molecular substances

   • S. J. Tao

   Contributed Papers Pages: 67 - 79

10. Dislocation damping in fcc LaAl₂

    • G. Herrmann
    • H. E. Bömmel

    Contributed Papers Pages: 81 - 84

11. Positron annihilation study of voids in a neutron irradiated aluminum single crystal

    • K. Petersen
    • N. Thrane
    • R. W. Hendricks

    Contributed Papers Pages: 85 - 90

12. Observation of domain wall motions in alanine doped triglycine sulphate ferroelectric crystal

    • Armand Hadni
    • Robert Thomas

    Letter Papers Pages: 91 - 92

13. Thermally stimulated current measurements on vapour-grown HgI₂

    • E. Fogarassy
    • G. M. Martin
    • E. Fabre

    Letter Papers Pages: 93 - 95

14. Experimental evidence for GaAs surface quality affecting ohmic contact properties

    • H. Paria
    • H. Hartnagel

    Letter Papers Pages: 97 - 99

15. Forthcoming papers

    Abstract Pages: A101 - A103

16. Book reviews

    • H. G. Musmann
    • R. Kaufmann
    • H. K. V. Lotsch

    BookReview Pages: A104 - A104