This article needs information about Nazi Germany's use of these machines as crucial tool in the extermination of Jews == 
 Edwin Blacks book IBM and the Halocaust details this and has extensive sources. 
 A start would be to add the 1939 Nazi racial census to the timeline, the largest, fastest and most extensive census at that time. 

 About this census, Black writes: 

 "The additional Hollerith machinery assembled was massive: 400 electrical key punches, 10 gang punches, 20 summary punches, 300 key punchverifiers, 70 sorters, 50 tabulators, 25 duplicators, and 50 D-11 VZ tabulators. The Reich had imposed seemingly impossible target delivery dates for November 1939. So to increase speed, Dehomag's engineers converted their versatile D-11 calculating tabulator into a pure counting machine dubbed the D-11 VZ. The improvised device could process 12,000 60-column punched cards per hour in sixteen counters and then precision-punch its own summaries onto 80-column cards. Eighty million cards were actually used. 5" 
 IBM and the Halocaust by Edwin Black page 175. 

 Black gives these sources for the above statement (which I am not in a position to verify): 

 5. "Aus dem Volkszahlungshaus in Berlin," Der Stromkreis (Werkzeitschrift DEHOMAG), Berlin, 66 (February 1940): 1-8, cited in Friedrich W Kistermann, "Locating the Victims: The Nonrole of Punched Card Technology and Census Work," IEEE Annals of the History of Computing, 19:2 (April-June 1997); 
 Hollerith-Tabelliermaschine D-11 mit Zahleinrichtung (D 11 VZ), (Berlin: Dehomag, 1939) cited in Kistermann, "Locating the Victims: The Nonrole of Punched Card Technology and Census Work"; 
 Letter, J.G. Johnston to J.E. Holt, June 14, 1938, Department of Justice, War Division, Economic Warfare Section, NA RG60; 
 also see Biehler, "Lochkartenmaschinen im Dienste der Reichsstatistik," Allgemeines Statistisches Archiv (ASA) 28 (1938/39): 90ff, 93. 

    

  
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