Bonnet, J. A., et al. “Tracing the Mineral from the Soil to the Plant Part V. Effect of Lime and Phosphorus on Guinea, Merker, and Para-Carib Grasses Grown in Association With Tropical Kudzu”. The Journal of Agriculture of the University of Puerto Rico, vol. 36, no. 2, Apr. 1952, pp. 141-54, doi:10.46429/jaupr.v36i2.12794.