The Water Cycle, A Quick Summary, Howard Perlman, http://water.usgs.gov/edu/watercyclehi.html, U.S. Geological Society, 2014.
Salt Water Intrusion Control in Coastal Washington, Department of Ecology Policy and Practice, Emily Tibbott, 72 p, United States Environmental Protection Agency, August 1992.
Seawater Intrusion Topic Paper, Doug Kelly, 27 p, Island County Water Resources Advisory Committee, 2005.
Water Smart, Not Water Short: 5 Ways to Secure Water for Washington’s Future, 12 p, Washington State Deptartment of Ecology, PUB 09-11-008, 2009.
Residential End Uses of Water, 352 p, American Water Works Association Research Foundation, 1999.