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	1.	No cover image available Orbicular volcanic rocks of Cerro Panizos : their origin and implications for orb formation by Ort, Michael H Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 104(8), 1992, p. 1048-1058: : ill., carte, graph., rés.(Angl) Availability: No items available.
	2.	No cover image available Lava, corn, and ritual in the northern southwest by Elson, Mark Ort, Michael Hesse, Jerome Duffield, Wendell Material type: Article; Format: print Language: Eng In: American antiquity 67(1), 2002, p. 119-135: : ill., cartes Availability: No items available.

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