A. K. Roy, Chatterjee, P. K., Gupta, K. N., Khare, S. T., Rau, B. B., and Singh, R. S.,
“Manual on the design, construction and maintenance of low-cost pour-flush waterseal latrines in India”, vol. no. 10. World Bank, Washington, DC, USA, p. iii, 109 p. : tab., techn. drawing, 1984.