Spaten und Ähren, not before 1935: title page (in subtitle: ... des Nationalsozialistischen Arbeitsdienstes) page 48 (... des NS.-Arbeitsdienstes)
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Volkslexikon Drittes Reich, c1998: page 666 (Freiwilliger Arbeitsdienst, est. 1931, became the Reichsarbeitsdienst)
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Wikipedia (2000-) (in 1931 the government of the Weimar Republic founded the Freiwilliger Arbeitsdienst to sponsor employment in public works; after the Nazis took over it was renamed Nationalsozialistischer Arbeitsdienst and later Reichsarbeitsdienst) | |