Permission is granted for reuse under the terms of the Creative Commons licence specified below. The required attribution is: Antal Gertheis, 2014. I would appreciate a message on my talk page if you plan to reuse this image outside of Wikimedia projects.
Made with Natural Earth raster + vector data (PD [1])
Historical borders: 'European Territorial Changes During WWII' dataset [2], GeoCommons (CC BY 3.0) adapted to this specific map
Based on information from Jan Karski's missions 1940-1943 map by Polish History Museum and Google Cultural Institute, other historical maps in Wikimedia Commons, as well as written sources
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.