information about the program of stay in the USA if it is limited by 2 weeks and about its possible prolongation for a week since additional invitation have been received

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)

thanks for the invitation and hopes that it will be possible to prolong stay in the USA for a week and visit Cornell University

The author asks to review his article "A new method for computing polynomial greatest common divisors" for a possible publication in IPL. He tells that his article was unreasonably rejected by the editor David Gries. The letter from the editor is attached.

This letter is addressed to all editors of the Annual Review. They are asked to send any comments to Prof. Floyd, the responsible editor for the survey on "Translator Writing Systems" by J.A. Feldman and D. Gries.

of problems, give by colleagues