Sánchez Jiménez, W. et al. 2018. Structural change of the agricultural and livestock vocation in the municipality of Purification, Tolima, Colombia. LIBRE EMPRESA. 15, 2 (Aug. 2018), 137–148. DOI:https://doi.org/10.18041/1657-2815/libreempresa.2018v15n2.5361.