Axtmayer, Joseph H., G. Rivera Hernández, and D. H. Cook. “CHEMICAL ANALYSES OF GRASSES”. The Journal of Agriculture of the University of Puerto Rico 24, no. 1 (January 1, 1940): 32–34. Accessed March 29, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/13593.