, New York (vol. 18, Fall 1958), following a conference by Mark Tobey in 1957 in San Francisco , during the sixth national UNESCO conference . It has been published, with no reference to the translator, in the catalogue of the Mark Tobey retrospective (18th October - 1st December 1961) at the Musée des Arts décoratifs in Paris. The excerpt of the letter to Marian Willard-Johnson also comes from the same catalogue.
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