J. E. M. Smet, Postma, L., and Jahan, H.,
“Guidelines for the improvement of school sanitation. Part 1. From needs assessment to proposal for improvements of school sanitation and water supply (for non-drinking purposes)”. IRC, Delft, The Netherlands, p. 36 p. + 43 p. annexes : fig., tab., techn.drwg., 2001.