This is fascinating... Over on Boing Boing, they've linked a digital scan of an entire high school yearbook from the Japanese American internment camp at Tule Lake, circa 1944. Take a look it here: "Aquila" 1944/45.

I actually recommend looking through the other collections in the University of California's digital archives. There's some amazing stuff in there, including the Japanese American Relocation Digital Archives. Check it out.