Abrams, R., and J. Vélez Fortuño. “Radiation Research With Pigeonpeas (Cajanus cajan): Results on X1 and X2 Generations”. The Journal of Agriculture of the University of Puerto Rico, vol. 45, no. 4, Oct. 1961, pp. 197-04, doi:10.46429/jaupr.v45i4.13758.