@article{McMahon2019, author = "Glenda McMahon and Ken Chatterton", title = "{Pre-cast concrete ring pit liner}", year = "2019", month = "5", url = "https://repository.lboro.ac.uk/articles/figure/Pre-cast_concrete_ring_pit_liner/7946402", doi = "10.17028/rd.lboro.7946402.v1" }