McMahon, Glenda Chatterton, Ken Infiltration trench filled with sand and gravel Infiltration trench filled with sand and gravel WEDC;Emergency Water Supply;Technical;Diagram;International and Development Communication 2019-05-09
    https://repository.lboro.ac.uk/articles/figure/Infiltration_trench_filled_with_sand_and_gravel/7873922
10.17028/rd.lboro.7873922.v1