... singular—departamento); Alto Paraguay, Alto Parana, Amambay, Boqueron, Caaguazu, Caazapa, Canindeyu, Central, Chaco, Concepcion, Cordillera, Guaira, Itapua, Misiones, Neembucu, Nueva Asuncion, Paraguari, Presidente ... — The 1991 CIA World Factbook • United States. Central Intelligence Agency.