Supplemental agreement : (Lota and Schwager projects) : between International Bank for Reconstruction and Development and Corporación de Fomento de la Producción and Carbonifera Lota-Schwager, dated July 1, 1964.
World Bank.
[Washington] : International Bank for Reconstruction and Development,
1964.
Bound with Loan agreements 160-174.
"Loans no. 171 and 172 CH."