Rev. acad. colomb. cienc. exact. fis. nat.- PDF Download

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
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PAJARO-PAYARES, Adolfo A. et al. Effect of particle size and oxidant concentration in the yield of humic acids from mineral coal using response surface methodology. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2017, vol.41, n.160, pp.361-369. ISSN 0370-3908.