Chantland, William T. Valorization of coffee. A detailed report of the transactions and facts relating to the valorization of coffee. Washington, 1913. 15 pp. U.S. 63rd Congress, 1st session. Senate Document, 36.
Coffee combine at bay. Tea and Coffee Trade Journal, 1912, XXII: 497–513.
Coffee valorization and the Sherman law. Journal of Political Economy, 1918, XXI: 162–163.
Coffee valorization scheme and the coming harvest, The. Economist, 1909, LXVIII: 910–911.
de Carvalho, J.C. O café do Brazil, estudos a favor da propaganda para a augmento do consumo e valorisação do café do Brazil no estrangeiro. Rio de Janeiro, 1901. 41 pp.
—— O café, sua historia, des valorisação e propaganda pada o augmento do consumo na Europa o algodão, a industria da tecelagem do algodão, sua origem, appareicimento e desenvolvimento na America do Sul. Conferencias publicas realissadas na séde la Sociedade nacional de agricultura. Rio de Janeiro, 1900. 53 pp.
Denis, Pierre. La crise du café au Brésil et la valorisation. Revue politique et parlementaire, 1908, LVI: 494–520.
Ferreira Rangel, Sylvio. Valorisação de café. Rio de Janeiro, 1906. 18 pp. Also, A Lavoura, IX: 81–90.
Ferrin, A.W. Brazilian plan of limiting shipments. Moody's Magazine, 1912, XIII: 409–414.
How the coffee trust has held its grip. Current Literature, 1912, LIII: 52–54.