1. Passive mode-locking of flashlamp pumped Rhodamine dye-lasers

   • D. J. Bradley
   • F. O'neill

   Papers Pages: 69 - 74

2. Laser beam-induced non-linear effects in optically active media

   • Stanisław Kielich

   Papers Pages: 75 - 87

3. Evaluation of visibility improvement in fog by the range gating technique

   • S. Donati
   • A. Sona

   Papers Pages: 89 - 101

4. The connection of geometrical optics with the propagation of gaussian beams and the theory of optical resonators

   • P. Baues

   Papers Pages: 103 - 118

5. Periodic resonant reflectors having quarter-wave air intervals

   • H. F. Mahlein
   • G. Schollmeier

   Letters Pages: 119 - 120

6. Optical addition and subtraction

   • A. Thetford

   Letters Pages: 120 - 120

7. Conference 1969

   Announcement Pages: 121 - 121

8. Conference 1970

   Announcement Pages: 121 - 121

9. Erratum

   • J. Warner

   Erratum Pages: ii - ii