Kyustrin

РГВА. Ф. 33988. Оп. 4а. Д. 36. Л. 342–346.
Summary Intelligence Report of the Directorate of the General Staff of the Red Army № 106 about events in the West: the transfer of Wehrmacht divisions from France and the makeup and deployment of German troops in East Prussia and on the territory of former Poland (with an attached diagram)
2 October 1940
Russian State Military Archive
coll. 33988, ser. 4а, fold. 36, ff. 342–346.

Summary – original, diagram – drawing