The Grapes of Wrath and Dustbowl Migration

Here are links to a few articles about The Grapes of Wrath and the Dustbowl Migration:

http://numerocinqmagazine.com/2012/08/27/the-senses-of-an-ending-the-grapes-of-wrath-novel-and-film-patrick-j-keane/

https://migration.ucdavis.edu/rmn/more.php?id=1355

http://faculty.washington.edu/gregoryj/dust%20bowl%20migration.htm