title: THE EFFECT OF THREE FACTORIAL LEVELS OF NITROGEN AND PHOSPHORUS ON THE GROWTH AND COMPOSITION OF CINCHONA LEDGERIANA.
authors.affiliation: OFFICE OF EXPERIMENT STATIONS, U. S. DEPARTMENT OF AGRICULTURE, MAYAGUEZ, PUERTO RICO.
authors.forename: A J
authors.initials: AJ
authors.lastname: Loustalot
authors.forename: H F
authors.initials: HF
authors.lastname: Winters