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Roses, Joan R. (2015) Spanish land reform in the 1930s: economic necessity or political opportunism? Economic History working paper series , 225/2015. The London School of Economics and Political Science, London, UK.
Wallis, Patrick (2012) Exotic drugs and English medicine: England's drug trade, c.1550-c.1800. Social History of Medicine, 25 (1). pp. 20-46. ISSN 0951-631X