Mouth of Columbia River.

1814

Lewis, Meriwether

Entrance to the Columbia River

1886

Corps of Engineers

1:60k

The Morning Oregonian, Cascade Locks Edition, December, 1896.

1896

Routledge, Fred A., 1873-1936

Navigation Chart For the Columbia River, Sheet No.1, Entrance to Upper Astoria

1903

C&GS

1:40k

Mouth of Columbia River.

1815

Lewis, Meriwether

Columbia River Entrance, the Wrecks and a Marine History of its Development.

1936

McBean, K.

Columbia River Entrance, Cape Disappointment.

1946

Bascom

Columbia River Entrance to Harrington Point. U.S.C. & G.S. 6151

1945

United States Department of Commerce.

1:40k

North Beach Washington on Line of Union Pacific System.

1918

Routledge, Fred A., 1873-1936

Approaches to the Columbia River

1884

C&GS

1:20k