[Allan Caplan, New York, until 1959]; Nelson A. Rockefeller, New York, 1959, on loan to The Museum of Primitive Art, New York, 1959–1978
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Graham, M.M., Juan Vicente Guerrero M., Michael J. Snarskis, and Z.S. Mendez. Jade in Ancient Costa Rica, edited by Julie Jones. New York: The Metropolitan Museum of Art, 1998.