Covering letter for the 4th batch of papers and to their list with names of Program Committee's members assigned to review corresponding papers, and this list itself.

for authors.

A.Ershov's paper "On the Essence of Compilation" is accepted. The attachment to the letter contains the tentative program of the Conference.

on rejection of A.Ershov's, S.Pokrovsky's and G.Stepanov's paper "The Internal Language of a Multi-Language Optimizer".

Covering letter for the Tentative Program of the Conference and this Program itself. Also the proposed sessions chairmen are requested to approve their participation, and any constructive suggestions regarding the program format are appreciated.

with ratings of submitted papers.

for the Conference participants.

for participants of the Conference.

on arrival to Canada.

with announcement on the Conference.

Boarding passes, a hotel card, a telegraph receipt.

of "The Algonquin" Hotel (three issues).

of "The Algonquin" Hotel for participants of the 1st Working Conference "Formal Description of Programming Concepts".

on Canadian touristic offices abroad.

of "Air Canada".

of "The Algonquin" Hotel.

Short information for participants of the "Formal Description of Programming Concepts" Conference. The attachment is an ad booklet for tourists in St.Andrews.

with program of the Conference.

Request to test the correctness of the thicket.

on arriving to Moscow.