Biblio

J. Besselink, Grupa, J., and Smulders, P., Behaviour of deepwell handpumps with PVC rising mains. Arnhem, The Netherlands: InterAction Design, 1990, p. 94 p.: 50 fig.

J. Besselink, “IAD handpump project inventory mission : Niger, Burkina Faso, Ghana, Kenya, 25.11.89-14.01.90”. InterAction Design, Arnhem, The Netherlands, p. 18, 5 p.: fig., photogr., 1990.

W. R. C. Kayombo, Pipe materials in transmission mains, vol. no. 6. Tampere, Finland: Tampere University of Technology, Dept. of Civil Engineering, 1981, p. iii, 65 p. : fig., tab.