The Black Book of Polish Jewry
The Black Book of Polish Jewry is a 1943 statement on the Treblinka camp. Allegations include mass killings of Jews at the camp by using electrocution and steam. Such allegations have now been abandoned even by non-Holocaust revisionists.
The statement was "sponsored" by several prominent Americans, Jews, and Poles. They included Eleanor Roosevelt (wife of President Franklin D. Roosevelt), several high-ranking American and Polish officials and politicians, and other prominent individuals, including Albert Einstein.