Paper "Internal language in a multilanguage programming system as a tool for input languages semantics formatisation" submitted to the conference "Programming languages semantics formalization and compilers construction" (GDR, Frankfurt-on-Oder, September 22-28, 1974) Date: 29.07.1974 Original document language: Russian Authors: Andrei Petrovich Ershov, S. B. Pokrovsky, Viktor K. Sabelfeld