Charles, D.A., G.I. Dávila-Pulido, A.A. González-Ibarra, J.C. Ríos-Hurtado, and A. Salinas-Rodríguez. 2025. “Effect of Particle Size, NaOH Concentration, and S L Ratio on the Extraction of Humic Acid from Leonardite”. Journal of BioProcess and Chemical Technology (JBCT) 17 (34): 27-34. https://revistas.uadec.mx/JBCT/article/view/196.