Delfel, N. E., Cabanillas, E. and Ortiz-Torres, E. (1962) “A Small-Scale Technique for Evaluation of the Effect of Spray Oils and Other Materials on Sugarcane Yields”, The Journal of Agriculture of the University of Puerto Rico, 46(4), pp. 328–333. doi: 10.46429/jaupr.v46i4.12352.