Mariota-Trías, F. 1947. A study of the effect of six qualitative character pairs on yield and component characters in the F2 of cross between two varieties of barley. The Journal of Agriculture of the University of Puerto Rico. 31, 3 (Jul. 1947), 227–247. DOI:https://doi.org/10.46429/jaupr.v31i3.12852.