Letter regret for not being able to come to the Colloquium on the Automata Theory and Programming Languages because of the Novosibirsk Symposium scheduled for August; proposal to exchange the Proceedings of these two meetings Date: 27.01.1972 Original document language: English Authors: Andrei Petrovich Ershov Organizations: IRIA (later INRIA) Addressee: Mauriņe Nivat
