Prof. I. Adan from Eindhoven, The Netherlands, August 19-23
Prof. V. Arnautu from Iasi, Romania, December 2-23
Dr. M. Berggren from Sweden, January 15-16
Dr. A. Bespalov from Moscow, Russia, May 6-26
Dr. J. Brandts from Utrecht, The Netherlands, July 1 - December 31
Dr. H. Burman from Amsterdam, The Netherlands, December 17-19
Dr. F. Desaint from Sophia Antipolis, France, August 5-16
Prof. V. Dorot from St. Petersburg, Russia, November 17-22
Dr. C.C. Douglas from Yale, USA, August 18-24
Prof. F. Dupret from Louvain, Belgium, July 5-7
Prof. A. Elbert from Budapest, Hungary, September 23 - October 6
Prof. I.B. Erunova from St. Petersburg, Russia, November 17-22
Dr. I. Farago from Budapest, Hungary, June 24 - July 13
Prof. M. Fremond from Champs sur Marne, France, August 7-16
Prof. R. Glowinski from Houston, USA, August 11-18
Prof. O. Golovin from St. Petersburg, Russia, November 17-22
Prof. S.C. Gupta from Bangalore, India, June 24 - June 27
Prof. R. Hoppe from Augsburg, Germany, January 12-14
Prof. H. Kawarada from Chiba, Japan, April 2-4
Prof. G. Morosanu from Iasi, Romania, December 2-29
Mr. A. Padiy from Moscow, Russia, August 10-31
Prof. P. Panagiotopoulos from Thessaloniki, Greece, September 15-18
Prof. U. Raitums from Riga, Latvia, October 7-20
Prof. M. Rudnicki from Warsaw, Poland, September 18 - October 31
Dr. A. Schmidt from Freiburg, Germany, August 5-16
Dr. J. Sima from Prague, Czech Republic, November 6
Dr. V. Sirotkin from Moscow, Russia, September 2-26
Prof. S. Stojanovic from Ohio, USA, June 1 - August 31
Dr. W.F. Spotz from Texas, USA, May 31 - June 20
Dr. D. Tiba from Bucharest, Romania, May 15 - June 12
Prof. C. verdi from Milano, Italy, July 31 - August 20
Prof. J. van der Wal from Eindhoven, The Netherlands, August 19-23