New York, 6 May 1955 - Institutional correspondence A letter from W.R. Keating & Company International to R. Lerondelle
New York, 23 January 1957 - Transport documents A letter from the vice-president of W. R. Keating & Company to Willem Sandberg
<em>Diacritics</em>, Baltimore: The Johns Hopkins University Press, vol. 25, no. 2 (summer, 1995): 9–63 - Essay “Archive Fever: A Freudian Impression”
Exhibition, MoMA, New York, June 2, 1967 – February 13, 1968 - Photograph View of the exhibition Guernica: Studies and Postscripts