Protected well with double bucket system - colour Kay Davey Rod Shaw Ken Chatterton 10.17028/rd.lboro.8059145.v1 https://repository.lboro.ac.uk/articles/figure/Protected_well_with_double_bucket_system_-_colour/8059145 Protected well with double bucket system - colour 2019-05-02 11:31:58 WEDC Technical Wells International and Development Communication