[1]
J. A. Bonnet, A. R. Riera, L. Rivera Brenes, and R. Orlandi, “Tracing the mineral from the soil to the plant to the animal blood Part IV-Effect of urea added to grass fertilized with lime and phosphorus on the nutrition and health of goats”, JAUPR, vol. 33, no. 2, pp. 67–73, Apr. 1949.