| 1.
| Yacupaj - Sustentabilidad de los servicios de agua y saneamiento (Spanish) | 1995/07/01 | 72007 | UNDP-Water & Sanitation Program |
| 4.
| South-South regional integration and industrial growth : the case of the Andean Pact (English) | 2001/06/30 | WPS2614 | Policy Research Working Paper |
| 10.
| Peru : Lineamientos para un programa nacional de agua y saneamiento rural (Spanish) | 1998/06/01 | 72046 | UNDP-Water & Sanitation Program |