Letter thanks A.P. Ershov for his letter of July, 7, encloses a copy of the letter to Mr. Moriwaki and asks to give comments about it (the letter is about resheduling of the special issue of NGC) Date: 20.07.1986 Original document language: English Authors: Yoshihiko Futamura Persons: Yukihisa Moriwaki Addressee: Andrei Petrovich Ershov