A series of lectures Editor's copy of the series of lectures "Problems in many-language systems" for the International Summer School on Language Hierarchies and Interfaces (in English with notes made by Hoare, Koster, Gries and Wulf) Date: 27.07.1975- 30.07.1975 Original document language: English Authors: Andrei Petrovich Ershov Persons: David Gries, C. A. R. Hoare, Cornelius Koster, William A. Wulf
