[1]
Martínez, G.A. et al. 1998. Evaluation of proton and europium (III) binding reactions in a sewage sludge humic acid. The Journal of Agriculture of the University of Puerto Rico. 82, 3-4 (Oct. 1998), 121–140. DOI:https://doi.org/10.46429/jaupr.v82i3-4.4071.