@article{Shaw2019, author = "Rod Shaw", title = "{Mixing concrete - 4: Emptying the contents of the container}", year = "2019", month = "2", url = "https://repository.lboro.ac.uk/articles/figure/Mixing_concrete_-_4_Emptying_the_contents_of_the_container/7314476", doi = "10.17028/rd.lboro.7314476.v1" }