Topography and landforms of Ecuador [electronic resource] / by Peter G. Chirico and Michael B. Warner ; U.S. Department of the Interior, U.S. Geological Survey.
Imprint
[Reston, Va.?] : U.S. Geological Survey ; Denver, CO : Information Services [distributor], 2005.
Mode of access: Internet from the USGS web site. Address as of 1/14/08: http://geology.er.usgs.gov/eespteam/terrainmodeling/ds_136.htm; current access via PURL.
Note
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