- Department of Transportation. Federal Highway Administration. Office of Planning, Environment, and Realty. Office of Natural and Human Environment. National Scenic Byways Program. 1991-9999
- National Archives at College Park - Still Pictures
The original finding aid described this photograph as: Original Caption: This tunnel in Unalaska's Dutch Harbor testifies of the region's part in World War II. Location: Dutch Harbor, Unalaska, Alaska Status: Public domain.