New York, 12 March 1956 - Institutional correspondence Bernard Karpel's letter to Willem Sandberg, dated 12 March 1956
New York, 27 November 1956 - Institutional correspondence Bernard Karpel's letter to Willem Sandberg, dated 27 November 1956
<em>October</em>, no. 110, Cambridge (MA): The MIT Press (autumn, 2004): 3–22 - Essay “An Archival Impulse”