Chart of the entrance channel of the Boca-Barra according to the survey made in November 1850 for the Tehuantepec Rail Road Company, New Orleans / by their engineer P.E. Trastour.
Relief shown pictorially; depths shown by soundings and isolines.; Publication information from accompanying title page of hosting item: Maps illustrating the isthmus of Tehuantepec.; From: Maps illustrating the isthmus of Tehuantepec. New York, 1852. Map no. 8.
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