Biblio

R. Hahn and Johansson, P., “Handpump testing and development: part 5 : the second year-results of completed and ongoing test”. Lund University, Institute of Technology, Department of Environmental Engineering, Lund, Sweden, p. 50 p.: fig., tab., 1985.

R. Hahn, “Handpump testing and development: part 3 : new design : particle separator, foot valve and rod guide”. Lund University, Institute of Technology, Department of Environmental Engineering, Lund, Sweden, p. 15 p.: fig., photogr., 1983.