Hydrogeologic framework, groundwater movement, and water budget in tributary subbasins and vicinity, lower Skagit River Basin, Skagit and Snohomish Counties, Washington [electronic resource] / by Mark E. Savoca ... [et al.] ; prepared in cooperation with the Skagit County Public Works Department, Washington State Department of Ecology, and Skagit County Public Utility District No. 1.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2009.