- 1) Matarazzo to Bingham, “..we hope to count upon your help.” May 13, 1969.
- 2) Bingham to Matarazzo, “You must know how sorry we are about the turn of events for the United States and Bienal.” August 4, 1969.
- 3) Bingham to Alan Fisher, “I was disturbed to learn…that my letter of August 4 to Mr. Matarazzo was the first word officially received by the Bienal.” August 28, 1969
- 4) Bingham to Matarazzo, “He regrets, as I do, that the United States will not have a representative exhibition at the Bienal this year.” September 19, 1969.
- 5) Bingham to Matarazzo, “…considering the wide range of problems we all face in our efforts to provide pertinent national contributions to the ever increasing number of international art exhibitions.” November 5, 1969.
