| Reference | {Deposit:: BALLIVIAN, O., AND RISACHER, F., 1981, LOS SALARES DEL ALTIPLANO DE BOLIVIA; METODOS DE ESTUDIO Y EVALUACION ECONOMICA: PARIS, OFFICE DE LA RECHERCHE SCIENTIFIQUE ET TECHNIQUE OUTRE-MER, 246 P.}{Deposit:: ROSKILL INFORMATION SERVICES LTD., 1993, THE ECONOMICS OF BORON, 7TH ED.: LONDON, ROSKILL INFORMATION SERVICES LTD., 156 P.}{Other Database:: CIMRI} |