Cunniff, Roger L. “The Birth of the Drought Industry: Imperial and Provincial Response to the Great Drought in Northeast Brazil, 1877-1880”. Revista De Ciências Sociais (Social Sciences’ Journal), vol. 6, no. 1 e 2, June 2020, pp. 65-82, http://www.periodicos.ufc.br/revcienso/article/view/59946.