Talleyrand, Henri, and M. A . Lugo-López. 1976. “PRELIMINARY EVALUATION OF TWO NEW HIGH-QUALITY PROTEIN OPAQUE-2 CORN VARIETIES ON AN ACID AND RELATIVELY INFERTILE SOIL (ULTISOL) OF PUERTO RICO”. The Journal of Agriculture of the University of Puerto Rico 60 (1):135-37. https://doi.org/10.46429/jaupr.v60i1.10595.