Cater, R.W. Coffee in Central America. Chambers' Journal, LXXVI: 570.
Choussy, Felix. Cultivo racional del café en centro América. San Salvador, 1917. 92 pp.
Fox, Alvin. Coffee growing in Central America. Simmons' Spice Mill, 1918, XLI: 420–421.
CEYLON
Abbay, R. Culture of coffee in Ceylon. Households Words, III: 109. Also, Nature, XIV: 375.
Cruwell, G.A. Liberian coffee in Ceylon. Colombo, 1878.
Hull, E.C.P. Coffee planting in southern India and Ceylon. London, 1877. 324 pp.
Keen, W. Coffee cultivation in Ceylon. London, 1871.
Lewis, G.C. Coffee planting in Ceylon. Colombo, 1855.
Sabonadière, William. The coffee-planter of Ceylon. London, 1870. 216 pp.