1. Estudio sobre la corteza de copalchi: tésis que para el exámen profesional de farmacia presenta al jurado calificador Author(s): Arévalo, Ricardo, author Publication: México : Oficina Tip. de la Secretaría de Fomento, 1887 Subject(s): RubiaceaeRubiaceae -- chemistry
2. Researches on the chemical and medical properties of the root of kahinca Author(s): François, André, 1775-1840 Publication: New York : F. & N. G. Carnes, 1831 Subject(s): RubiaceaePlant Roots
3. On the use of sulphate of cinchonidia: in parts of the states of Illinois, Indiana, Missouri, Kentucky, and in the Mississippi Valley in 1875 Publication: Philadelphia : James A. Moore, Printer, 1876 Subject(s): CinchonaRubiaceaePlants, MedicinalMidwestern United States