Another new USGS report describes their work that "developed a multitemporal land-use/land-cover dataset for the binational Santa Cruz watershed of southern Arizona, United States, and northern Sonora, Mexico by creating a series of land-cover maps at decadal intervals (1979, 1989, 1999, and 2009) using Landsat Multispectral Scanner and Thematic Mapper data..."
Villarreal, M.L., Norman, L.M., Wallace, C.S.A., and van Riper, Charles, III, 2011, A multitemporal (1979-2009) land-use/land-cover dataset of the binational Santa Cruz Watershed: U.S. Geological Survey Open-File Report 2011-1131, 26 p. and database.