Plan of Treblinka, drawn in 1945 by the Polish surveyor K. Trautsolt; with the rubber stamp possibly of the Main Commission for the Investigation of Nazi Crimes in Poland (Główna Komisja Badania Zbrodni Hitlerowskich w Polsce) or more likely of the District Court (illegible), and signed by Łukaszkiewicz. Simplified version (with already typed legend) was published in the book by Z. Łukaszkiewicz, titled "Obóz straceń w Treblince", Państwowy Instytut Wydawniczy PIW, Warsaw 1946.