TONKIN
Rottach, Edmond. L'organisation économique de l'Indochine et le café au Tonkin. Société de Géographic commerciale de Paris. Bulletin, 1913, XXXV: 643–660.
UNITED STATES
American tea and coffee trade from 1847 to 1916. Tea and Coffee Trade Journal, 1917, XXXIII: 28.
Coffee Exchange of the City of New York. Annual Report.
Coffee trade of the United States. Chamber of Commerce, New York. Annual Report 1908–1909, pt. 1: 23–29.
Coffee Trade of the United States for the past six years. Tea and Coffee Trade Journal, 1917, XXXIII: 326–329.
Coffee Trade of the United States since 1821. Tea and Coffee Trade Journal, 1918, XXXIV: 336–338.
Cunningham, E.S. Export of Mocha coffee to the United States. U.S. Consular Reports, 1899, LXI: 625–628.
Our fastest growing coffee port, including handling green coffee at San Francisco. The Tea and Coffee Trade Journal, 1918, XXXIV: 524–528.