Bonn, 16 February 1956 - Institutional correspondence Antonio Mª Aguirre's letter to Alberto Martín-Artajo Álvarez
New York, ca. March 1947 - Photograph Ralph Burns, Edwin A. Finckel, George Handy, Neal Hefti, Johnny Richards and Eddie Sauter
<em>The New York Times</em>, New York, November 11, 1990, 1, 39 - Article “When Picasso Spooked the FBI”