Esquerra
British volunteers in the Spanish Civil War : the British Battalion in the International Brigades, 1936-1939.
Dreta

BAXELL, Richard. British volunteers in the Spanish Civil War : the British Battalion in the International Brigades, 1936-1939. London ; New York : Routledge, 2004. 221 p.

https://sidbrint.ub.edu/es/node/12538