John R. Watkins, 1936, 21 August, [Authorization for photographer John R. Watkins during the Spanish Civil War], Letter, copy, University of Warwick, LL/50325

Unidentified photographer / montagist, 1937, January, Madrid - The "Military" Atrocities of the Rebels - A Record of Massacre, Murder, Mutiltation - Labour Party Price 1d., Pamphlet, cover, University of Warwick, LL/50324