Soviet map of expanded Belorussian SSR (year 1940). Scale: 1:5,000,000. The territories annexed from occupied Poland marked in yellow. The adjacent parts of Second Polish Republic occupied by Nazi Germany are labeled <i>area of state interests of Germany</i>.
Soviet government
Карманный атлас СССР. 11-е изд. — Ленинград: ГУГК при СНК СССР, 1940 — Council of People's Commissars of the USSR, 1940. Page 39.