Cibes, H. R. and Adsuar, J. (1966) “Effects of Chlorethanol and Thiourea on the Germination and Relative Yield of the Yam (Dioscorea alata) L”., The Journal of Agriculture of the University of Puerto Rico, 50(3), pp. 201–208. doi: 10.46429/jaupr.v50i3.3457.