McMahon, Glenda Shaw, Rod Twin-pit latrine 3 Twin-pit latrine 3 WEDC;Twin pit latrines;Latrines;Technical;Diagram;International and Development Communication 2019-05-02
    https://repository.lboro.ac.uk/articles/figure/Twin-pit_latrine_3/7957571
10.17028/rd.lboro.7957571.v1