HALL, Christopher. In Spain with Orwell: George Orwell and the Independent Labour Party Volunteers in the Spanish Civil War, 1936-1939. Perth: Tippermuir Books Limited, 2013. 277 p.
HALL, Christopher. Not just Orwell: The Independent Labour Party Volunteers and the Spanish Civil War. [S.l.] : Warren & Pell, 2009.
https://sidbrint.ub.edu/es/node/27671