40 | Bibliografía

1979. THE POSTAL HISTORY OF THE INTERNATIONAL BRIGADES IN SPAIN 1936-39. Ronald G. Shelley. Published by The Spanish Philatelic Society, Bookclub Nº11. Brighton,1979.

Traducciones automáticas

1979. THE POSTAL HISTORY OF THE INTERNATIONAL BRIGADES IN SPAIN 1936-39. Ronald G. Shelley. Published by The Spanish Philatelic Society, Bookclub Nº11. Brighton, 1979.