Roos, C.

Kooijmans, J.L. & Roos, C., 1990. Virudhunagar integrated development project Tamil Nadu State, India : conception report : section: potable water supply, sanitation and health education, Haarlem, The Netherlands: Waterleidingbedrijf Zuid-Kennemerland. Available at: https://es.ircwash.org/sites/default/files/822-INTA90-8169.pdf.