McMahon, Glenda Chatterton, Ken Corbelled brickwork 2 Corbelled brickwork 2 WEDC;Latrines;Pit-linings;Technical;Diagram;International and Development Communication 2019-05-07
    https://repository.lboro.ac.uk/articles/figure/Corbelled_brickwork_2/7946375
10.17028/rd.lboro.7946375.v1