Riga

5 October 1939
Archive of Foreign Policy of the Russian Federation
Coll. 3а, ser. 1, box 12, fold. 139.

Original. In Russian and Latvian

17 June 1940
Russian State Military Archive
Coll. 37977, ser. 1, fold. 681, ff. 88–89.

Certified copy

[After 16 June 1940]
Russian State Military Archive
Coll. 37977, ser. 1, fold. 681, f. 98.
21 June 1940
Russian State Archives of Film and Photo Documents
Archive № 0-271400.
Photograph