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Lombardo, Umberto; Canal-Beeby, Elisa; Veit, Heinz (2011). Eco-archeological regions in the Bolivian Amazon. An overview of pre-Columbian earthworks linking them to their environmental settings. Geographica Helvetica, 66(3), pp. 173-182. Copernicus Publications 10.5194/gh-66-173-2011
Lombardo, Umberto; Canal-Beeby, Elisa; Fehr, Seraina; Veit, Heinz (2011). Raised fields in the Bolivian Amazonia: a prehistoric green revolution or a flood risk mitigation strategy? Journal of archaeological science, 38(3), pp. 502-512. Oxford: Elsevier 10.1016/j.jas.2010.09.022
