M. Snel, Ganguly, S., en Shordt, K.,
School sanitation and hygiene education - India. Handbook for teachers, vol. no. 39. Delft, The Netherlands: IRC, 2002, p. 45 p. : boxes, fig., tab.
M. Snel, Ganguly, S., en Shordt, K.,
School sanitation and hygiene education - India. Resource book, vol. no. 39. Delft, The Netherlands: IRC, 2002, p. 268 p. : boxes, fig., tab.
K. Shordt en Snel, M.,
“School water and sanitation towards health and hygiene in India”, in
Sustainable environmental sanitation and water services : proceedings of the 28th WEDC conference, Kolkata (Calcutta), India, 18-22 November 2002, 2002, pp. P. 260-262 : box, fig., tab.