1. Proceedings of a USGS Workshop on Facing Tomorrow's Challenges Along the U.S.-Mexico Border : monitoring, modeling, and forecasting change within the Arizona-Sonora transboundary watersheds Author/Creator: USGS Workshop on Facing Tomorrow's Challenges along the U.S.-Mexico Border Tucson, Ariz.) (2007 Publication/Creation: Reston, Va. : U.S. Geological Survey, 2008 Resource Type: Book Access & Availability: Loading