Skinner, Brian Shaw, Rod Chatterton, Ken Handpumps – An Overview: Part 4b of 6 – Deepwell pumps: The Afridev Handpumps – An Overview: Part 4b of 6 – Deepwell pumps: The Afridev Handpumps;International and Development Communication 2019-09-03
    https://repository.lboro.ac.uk/articles/media/Handpumps_An_Overview_Part_4b_of_6_Deepwell_pumps_The_Afridev/9761549
10.17028/rd.lboro.9761549.v1