Extract from the addendum to the SBAS Presidium direction of March 13, 1981 - "Tasks and stages of development and application of new machinery amd technologies for 1981-1985" Date: 16.06.1981- 27.07.1981 Original document language: Russian Authors: Yuri P. Zuikov Persons: Andrei Petrovich Ershov Addressee: Gennadii Dmitrievich Chinin, Boris N. Pischik