NAKAMURA, Seiichi, Kazuo Aoyama, and Eiji Uratsuji, Investigaciones Arqueologicas en la Region de la Entrada , 3 volume report of the Japanese archaeological expedition northeast of Copan: ceramics, artifacts, sculpture, hieroglyphs (decipherments by Linda Schele).

THE MUSEUM JOURNAL, The ULUA Marble Vases by G. B. Gordon, 15 B&W photos of vases, The Use of Metals in Prehistoric America and A Golden Hoard from Ecuador by William Curtis Farabee, The Museum Journal, Univ. Of Pa, March, 1921 , Vol XII, No. 1, (original),


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