Military man with rank of major before the war, Plan commander - Polish underground group, first organized in occupied Poland.
In file: testimony on course of meeting with commanders of Jewish Military Organization (ZZW), held in Tarjuka (Polish).
His work on ZZW issues: historical background and structure of organization, operations, tunnel under Muranowska street, supply of weapons, ZZW share of Warsaw ghetto uprising in April 1943 (in Polish). Excerpts translated into Hebrew from book "The Masada of Warsaw" by Haim Lazar.
Letter from Mariusz Catling, son of Cezary Catling, to Chaya Lazar (Polish).
Certificate that participated in Warsaw ghetto uprising and helped some 500 Jews leave the ghetto and go to Aryan side.