Lugo-López, M. A., Carrera-Murillo, W. and Bauzá, J. (1980) “Tropeptic Haplustox: Major soils of the plains of Riberalta-Guayaramerin in northeastern Bolivia”, The Journal of Agriculture of the University of Puerto Rico, 64(4), pp. 391–399. doi: 10.46429/jaupr.v64i4.10184.