Page recommended by Justin Byrne (NYU professor): ALBA

http://www.alba-valb.org

The Abraham Lincoln Brigade Archives (ALBA) is a non-profit educational organization dedicated to promoting public awareness, research, and discussion about the Spanish Civil War and the American volunteers who risked their lives to fight fascism in Spain. Using its continually expanding archival collections in exhibitions, publications, performances, and educational programs, ALBA preserves the legacy of progressive activism and commitment of the Abraham Lincoln Brigade as an inspiration for present and future generations. 

http://www.alba-valb.org/books
http://www.alba-valb.org/books

“War Is Beautiful: An American Ambulance Driver in the Spanish Civil War”

Authors: James Neugass, Peter N. Carroll, Peter Glazer.