Message from Soviet People’s Commissar of Internal Affairs L. Beria to Soviet People’s Commissar of Defence K. Voroshilov about the collection by French secret services of information about the topography, roads, and natural hindrances of Transcaucasian Soviet republics

14 December 1939
Russian State Military Archive
Coll. 33987, ser. 3а, fold. 1242, f. 146.