1. Measurement of the rotational viscosity of nematic liquid crystals

   • P. R. Gerber

   Contributed Papers Pages: 139 - 142

2. Formation of holographic diffraction gratings in photoresist

   • L. Mashev
   • S. Tonchev

   Contributed Papers Pages: 143 - 149

3. Injection electroluminescence from CdTe p-n junctions prepared by LPE

   • M. Kitagawa
   • J. Saraie
   • T. Tanaka

   Contributed Papers Pages: 151 - 156

4. Thresholds for impact ionisation in InSb at 77K

   • R. G. van Welzenis

   Contributed Papers Pages: 157 - 163

5. Effect of size quantization on the Einstein relation in ultrathin films of non-parabolic semiconductors

   • A. N. Chakravarti
   • K. P. Ghatak
   • S. Ghosh

   Contributed Papers Pages: 165 - 169

6. Electrical properties of CuTlSe₂ in the liquid state

   • A. H. Abou El Ela
   • N. Abdelmohsen
   • H. H. A. Labib

   Contributed Papers Pages: 171 - 173

7. The electronic behaviour of iron in U(Fe_xAl_1−x)₂

   • M. K. Fayek
   • A. A. Bahgat
   • A. Eltawansi

   Contributed Papers Pages: 175 - 178

8. Thermal annealing and light irradiation effects on hole and electron drift mobilities of Se_93.5As_6.5 and Se_94.3Ge_5.7 films

   • T. Takahashi
   • M. Ichikawa
   • T. Hirai

   Contributed Papers Pages: 179 - 184

9. Optical frequency mixing in planar waveguides: Influence of crystal orientation

   • G. P. Bava
   • R. Orta

   Contributed Papers Pages: 185 - 190

10. Space-charge analysis for the admittance of semiconductor junctions with deep impurity levels

    • C. Ghezzi

    Contributed Papers Pages: 191 - 202

11. Viscosity of liquid selenium and selenium-sulphur mixtures

    • A. H. Abou El Ela
    • K. A. Sharaf
    • H. H. A. Labib

    Contributed Papers Pages: 203 - 206

12. Forthcoming papers

    Announcement Pages: A5 - A6