Aztecan pigments

Does anyone know of a reference source on pigments used by the
Aztecs? I would appreciate any leads in either English or Spanish.
Thank you,

M. Susan Barger, PhD
Department of Earth and Planetary Sciences
University of New Mexico
Albuquerque, NM

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                  Conservation DistList Instance 9:78
                   Distributed: Friday, May 24, 1996
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