Postma, S.F.

Marchesini, L. & Postma, S.F., 1978. Cost comparison of windmill and engine pumps, Amersfoort, The Netherlands: Steering Committee for Windenergy in Developing Countries (SWD). Available at: https://ircwash-d7.platform-3.co.uk/sites/default/files/232.3-78CO.pdf.