Related publication: Why? : Extermination Camp Lwów (Lemberg), 134 Janowska Street, Poland : a documentary / by an inmate, Leon Richman. -- 1sr ed. -- New York : Vantage Press, c1975.
Associated material: Sophia R. Holocaust testimony [daughter] (HVT-1578), Fortunoff Video Archive for Holocaust Testimonies, Yale University Library.