Observations of Environmental Change in Grand Canyon, Arizona (U.S. Geological Survey Water-Resources Investigations Report 02-4080. Robert H. Webb, Theodore S. Melis, Richard A. Valdez.

Observations of Environmental Change in Grand Canyon, Arizona (U.S. Geological Survey Water-Resources Investigations Report 02-4080

Tucson: U. S. Geological Survey, 2002. Paperback. 33pp. Very thin quarto [28 cm] Stapled black and white illustrated wraps. Very good condition. Item #35936

Prepared in cooperation with Grand Canyon Monitoring and Research Center.

Price: $10.00