Farm Security Administration photographer Dorothea Lange came across Florence Thomson and her children in a pea pickers' camp in Nipomo, California, in March 1936. During the decade of the Great Depression, California's population grew by more than 20 percent, an increase of 1.3 million people. More than half of the newcomers came from cities, not farms. One in six were professionals or white-collar workers. Of the 315,000 who arrived from Oklahoma, Texas, and neighboring states, only 16,000 were from the Dust Bowl itself. Regardless of where they came from, what their skills were, or their education, to most Californians, and the nation at-large, they were all the same: Okies. Source: The Library of Congress.