Thanks for the link, Nicole. I can highly recommend Dorothea Lange: Photographs of a Lifetime published by Aperture in about 1982 or so. It's not in print any more, but not too hard to find, nor too expensive. It includes and excellent essay by Robert Coles. My husband gave it to me for my b-day this year; the reproductions are gorgeous, and gave me some great insight into her life and photographs. The book made me realize that though she made probably one of the most famous photographs ever, Migrant Mother, her whole body of work is very well seen, very beautiful, and quite thoughtful.