Letter The author informs of the decision to hold a one-day symposium timed to the anniversary celebrations, and to publish the Anniversary volume of Proceedings, and asks for assistance in organizational matters Date: 31.08.1984 Original document language: English Authors: Heinz Zemanek Persons: Friedrich L. Bauer, Pierre A. Bobillier, Kaoru Ando Addressee: Andrei Petrovich Ershov