@article{Hopkins_Pagán_Ramírez Silva_1944, title={IRON AND MANGANESE IN RELATION TO PLANT GROWTH AND ITS IMPORTANCE IN PUERTO RICO}, volume={28}, url={https://revistas.upr.edu/index.php/jaupr/article/view/12877}, DOI={10.46429/jaupr.v28i2.12877}, abstractNote={Resumen en inglés.}, number={2}, journal={The Journal of Agriculture of the University of Puerto Rico}, author={Hopkins, E. F. and Pagán, Víctor and Ramírez Silva, F. J.}, year={1944}, month={Apr.}, pages={43–101} }