Collet, Hélène, Philippe Lavachery, and Michel Woodbury. “Raw Material Exploitation Strategies on the Flint Mining Site of Spiennes (Hainaut, Belgium)”. Journal of Lithic Studies 3, no. 2 (September 15, 2016): 127-162. Accessed April 25, 2024. http://journals.ed.ac.uk/lithicstudies/article/view/1821.