McMahon, Glenda Chatterton, Ken Clamp for gripping rising main Clamp for gripping rising main WEDC;Technical;Diagram;Pumps;Water;Handpump;International and Development Communication 2019-04-30
    https://repository.lboro.ac.uk/articles/figure/Clamp_for_gripping_rising_main/7981880
10.17028/rd.lboro.7981880.v1