Member of Netzivut Betar before the war, was in Warsaw ghetto since its establishment in 1942, was one of advocates and realizers of Hrubieszow program. Survived.
In file: his testimony on subjects: first days of occupation, attempts to organize and continued Betar operations, publication of special publication entitled 'The State' for first anniversary of death of Zeev Jabotinsky, preparations of newspaper.
Article by Lasker in 'Herut' newspaper: 'Etzel first raised the banner of revolt in Warsaw' (24/04/1962).
Correspondence with Isaac David Ramba about David Wdowinski.