Do Re Mi
by Woody Guthrie
Though the layout is a little awkward, the site includes a good biography, a detailed listing of the contents of the Woody Guthrie archives, and free listening to lots of great songs.
This is an informative website full of clear information and compelling photos about the Dust Bowl migration and other great migrations in California's history.
Photographer Dorothea Lange took an iconic series of photos of Dust Bowl migrants in the 1930s—you should recognize some of her images already.