S. S Sumioka

• A survey of ground-water quality in the Toppenish Creek basin, Yakama Indian Reservation, Washington, 1989-91
• Estimating ground-water recharge from precipitation on Whidbey and Camano Islands, Island County, Washington, water years 1998 and 1999
• Magnitude and frequency of floods in Washington
• Quality of water in an inactive uranium mine and its effects on the quality of water in Blue Creek, Stevens County, Washington, 1984-85