"[Dictionary of the Holocaust : Biography, geography, and terminology / E.J. Epstein, P. Rosen. – Westport, 1997. – p. 66\r\nThe EHRI project selected descriptions of the Holocaust-relevant collections from the finding aid \"Informator o zasobie archiwalnym Instytutu Pamięci Narodowej\", Ed. Jerzy Bednarek, Rafał Leśkiewicz, Warszawa 2009, ISBN 978-83-7629-068-3]" . "Founded in 1933-05-10, under the leadership of Dr. Robert Ley, the Deutsche Arbeitsfront supplanted labor unions. This arm of the Nazi government comprised 20 million workers. Wages were frozen, strikes prohibited, independent unions banned, and working conditions were controlled by the government."@eng . "Deutsche Arbeitsfront"@eng . .