Davey, Kay Shaw, Rod Chatterton, Ken Handpump being used for de-watering a well excavation Handpump being used for de-watering a well excavation WEDC;Technical;Wells;International and Development Communication 2019-05-02
    https://repository.lboro.ac.uk/articles/figure/Handpump_being_used_for_de-watering_a_well_excavation/8059178
10.17028/rd.lboro.8059178.v1