University of Illinois
University of Illinois: Modern American Poetry: About the Spanish Civil War
An extensive resource covering many aspects of the Spanish Civil War. First read an overview of the conflict before looking at the many primary sources related to the war.
Library of Congress
Loc: Today in History: July 17: The Spanish Civil War
The Spanish Civil War was a precursor of the tumult of World War II. Read a brief description of those involved in this civil war and see posters supporting each side.