Abstract
Change in time and location. Because of the large number of preliminary registrants, the accommodation facilities of the Hotel DUNA Inter-Continental would have been inadequate. Thus, the location will be in a special congress building that can accommodate the plenary sessions for over 1000 participants. The building also contains 6 other meeting rooms of small sizes. It is located at 84 Dózsa György Street, Budapest.
The shift in location has necessitated a change in the time of the Congress to 27 June to 3 July 1971.