F. E. McJunkin,
Hand pumps : for use in drinking water supplies in developing countries, vol. no. 10. The Hague, The Netherlands: IRC, 1977, p. 230 p.: tab., drwng., photogr.
IRC International Water and Sanitation Centre, The Hague, NL,
“International workshop on hand pumps for water supply, Voorburg (The Hague), The Netherlands, 12-16 July 1976 : report”, vol. no. 8. IRC, The Hague, The Netherlands, p. 30 p. : photogr., 1977.
P. O. Lehmusluoto,
“Introduction to algal assays in water research”. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. 22 p., 1977.