Quintanilla, E. de

Requena, L.F. & de Quintanilla, E., 1993. El Salvador : program for monitoring surface and groundwater in the watershed between the Barra de Santiago and El Impossible, (Wash field report no. 425) Arlington, VA, USA: Water and Sanitation for Health Project (WASH). Available at: https://www.ircwash.org/sites/default/files/242-93EL-11292.pdf.