Umpqua River entrance.

1946

Bascom

Entrance To Umquah River, Oregon

1854

U.S. Coast Survey

1:20k

Umpqua River. Winchester Bay.

1946

Bascom

Landforms of the Umpqua South Area, the Oregon Dunes National Recreation Area, Oregon - Continued.

1980

Richmond, Bruce M.

Landforms of the Umpqua South Area, the Oregon Dunes National Recreation Area, Oregon.

1980

Richmond, Bruce M.

Umpquah River Entrance

1854

Unknown

1:20k

Eolian Activity. Coastal Dunes-Transverse. Reedsport, Ore.

1966

O'Brien, Emmett J

1:63k

Reedsport

1980

US Geological Survey

1:100k

History of the Pacific States of North America

1882

Bancroft, Hubert Howe.

A Diagram of a Portion of Oregon Territory

1851

U.S. General Land Office