Until 1935 Engelina Polak was a district administrator for the organisation 'Vereeniging van Vrienden der Sovjet-Unie' (Organisation Friends of the Soviet Union).
Archief Centrale Inlichtingendienst
Until 1935 Engelina Polak was a district administrator for the organisation 'Vereeniging van Vrienden der Sovjet-Unie' (Organisation Friends of the Soviet Union).
Archief Centrale Inlichtingendienst