Surface waters of the West Canada Creek Drainage Basin : comprehensive plan for prevention and abatement of pollution.

"January, 1964."

Washington and the West; being George Washington's diary of September, 1784, kept during his journey into the Ohio basin in the interest of a commercial union between the Great Lakes and the Potomac River,

Mode of access: Internet.

Water quality in the Potomac River basin, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia, 1992-96 /

Mode of access: Internet.

Nonpoint-source discharges and water quality of the Elk Creek basin, west-central Wisconsin /

Mode of access: Internet.