Letter Request for help in finding out why the author had not received the letter by Academician Dorodnitsyn; informing of sending over some of the author's papers and asking Ershov so send him some of his works Date: 11.01.1959 Original document language: English Authors: Walter Hoffmann Persons: Anatoli Alekseyevich Dorodnitsyn Addressee: Andrei Petrovich Ershov
