APA Citation

Geological Survey (U.S.), & Water Resources Council (U.S.). (1976). Hydrologic unit map--1974, State of Oregon. Reston, Va.: The Survey.

Chicago Style Citation

Geological Survey (U.S.), and Water Resources Council (U.S.). Hydrologic Unit Map--1974, State of Oregon. Reston, Va.: The Survey, 1976.

MLA Citation

Geological Survey (U.S.), and Water Resources Council (U.S.). Hydrologic Unit Map--1974, State of Oregon. Reston, Va.: The Survey, 1976.

Warning: These citations may not always be 100% accurate.