Dicke, Robert J. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XLIV (1955)
McCabe, Robert A.
The prehistoric engineer-farmers of Chihuahua, pp. 75-90 PDF (6.1 MB)
The hieroglyphics found on a large boulder did not appear to contain any figure writing. Only simple designs covered the stone on one face. The pottery fragments (left) and part of a mano found in the ruins on the Gavilan River indicated a maize agriculture had once existed in this area. 82 Wisconsin Academy of Sciences, Arts and Letters [Vol. 44
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