Vulcanism. Radial Drainage. Unimak, Alaska.

1966

O'Brien, Emmett J

1:250k

Alaskan Peninsula - Navigation Chart

1882

1:333k

Applegates

1911

New Anchorage

1879

1:849k

Harbors and Anchorages : Sannak Island and Ikatan Peninsula

1912

C&GS

1:20k

Alaska - Aleutian Islands : Unimak and Akutan Passes and approaches. U.S.C & G.S. 8860

1940

United States Department of Commerce.

1:1m

Alaska - Aleutian Islands : Unimak and Akutan Passes and approaches. U.S.C. & G.S. 8860

1942

United States Department of Commerce.

Reconnaissance of Dora Harbor

1884

Corwin

1:20k

Alaska Peninsula and Adjacent Islands

1882

C&GS

1:596k

H. M. S. Porpoise Cruising on Seal Fishery Outies in the Bering Sea Aug 7 to Aug 19 1891

1891

H. M. S. Porpoise

1:2m