↑Rupp, David E «Unconfined Aquifer Permeability near hand-dug Wells in the Coastal and Interior dryland of the Libertador General Bernardo O'Higgins Region, Chile». Chilean Journal of Agricultural Research, vol. 71, 2, 2011, pàg. 267–274. DOI: 10.4067/S0718-58392011000200012. ISSN: 0718-5839. «In the dryland of the Libertador General Bernardo O'Higgins Region in Chile, most farmers rely [...]»