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
Cover of <em>Life</em>, New York, May 15, 1970 - Magazine “Tragedy at Kent. Cambodia and Dissent: The Crisis of Presidential Leadership”