Letter with Enclosure and its Translation into Russiun Proposal to join the Program Committee of the International Symposium on Programming Languages. Enclosed is the IFIP/TC2 decision to hold the symposium in honour of Prof. A. van Wijngaarden Date: 06.11.1979 Original document language: russian Authors: Jaco W. de Bakker Persons: Aad van Wijngaarden, J. C. van Vliet Addressee: Andrei Petrovich Ershov