Skinner, Brian Shaw, Rod Chatterton, Ken Handpumps – An Overview: Part 2 of 6 – Suction pumps Handpumps – An Overview: Part 2 of 6 – Suction pumps Handpumps;International and Development Communication 2019-09-03
    https://repository.lboro.ac.uk/articles/media/Handpumps_An_Overview_Part_2_of_6_Suction_pumps/9759251
10.17028/rd.lboro.9759251.v1