Letter informing of the interest of Ershov and his colleagues to the addressee's article "On introducing new data types in Algol X" and suggesting to start a scientific discussion on the subjects of this paper by correspondence Date: 17.11.1964 Original document language: russian Authors: Andrei Petrovich Ershov Persons: Yu. M. Voloshin, G. I. Kozhukhin Addressee: John McCarthy
