File:Kowalewski 1920.jpg

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English: Translation of Soviet cyphertext decrypted by cryptologists of the Polish Army during Battle of Warsaw (August 1920) , decisive battle of the Polish-Soviet War, made by Jan Kowalewski - Polish cryptologist, intelligence officer - creator and first head of the Polish Cipher Bureau.
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Source Centralne Archiwum Wojskowe
Author Polish Army 1920
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This image is in the public domain according to Article 4, case 2 of the Polish Copyright Law Act of February 4, 1994 (Dz. U. z 2022 r. poz. 2509 with later changes) "normative acts and drafts thereof as well as official documents, materials, signs and symbols are not subject to copyrights". Hence it is assumed that this image has been released into public domain. However in some instances the use of this image in Poland might be regulated by other laws.

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current16:51, 2 March 2020Thumbnail for version as of 16:51, 2 March 2020595 × 960 (166 KB)Andros64 (talk | contribs){{Information |description ={{en|1=Translation of Soviet cyphertext decrypted by cryptologists of the Polish Army during Battle of Warsaw (August 1920) , decisive battle of the Polish-Soviet War, made by Jan Kowalewski - Polish cryptologist, intelligence officer - creator and first head of the Polish Cipher Bureau.}} |date =August 1920 |source =Centralne Archiwum Wojskowe |author =Polish Army 1920 |permissi...

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