McMahon, Glenda Chatterton, Ken Basic principles of piston pumps Basic principles of piston pumps WEDC;Water for low-income communities;Filters;Tanks;Sand filters;International and Development Communication 2019-02-20
    https://repository.lboro.ac.uk/articles/figure/Basic_principles_of_piston_pumps/7688336
10.17028/rd.lboro.7688336.v1