F. Rosensweig and Perez, E.,
“Sanitation in small towns : summary report on sub-regional workshops, Environmental Health Project, Water and Sanitation Program, Pan American Health Organization,.Cuzco, Peru, October 1-3, 2002, Tela, Honduras, November 19-21, 2002”, vol. no. 117. Environmental Health Project (EHP), Arlington, VA, USA, p. vii, 36 p., 2003.