Attlee

АВП РФ. Ф. 059. Оп. 1. П. 325. Д. 2233. Л. 252–255.
Cipher telegram from Soviet Plenipotentiary Representative in Great Britain I. Maisky to the Soviet People’s Commissariat of Foreign Affairs about the European diplomatic tour of US Under Secretary of State S. Welles
18 March 1940
Archive of Foreign Policy of the Russian Federation
Coll. 059, ser. 1, box 325, fold. 2233, ff. 252–255.

Certified copy