Title
Comparative study of ground-water quality, 1976 and 1996, and initial gain-and-loss assessment of Boulder Creek, Boulder County, Colorado / by Breton W. Bruce, and Christopher O'Riley ; prepared in cooperation with the Boulder County Health Department, and the City of Boulder, Colorado.
Published
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey : Branch of Information Services [distributor], 1997.