Ventspils (Vindava)

АВП РФ. Ф. 3а. Оп. 1. П. 12. Д. 139.
Mutual Assistance Treaty between the Republic of Latvia and the USSR
5 October 1939
Archive of Foreign Policy of the Russian Federation
Coll. 3а, ser. 1, box 12, fold. 139.

Original. In Russian and Latvian