Roman ornamental stones in North-Western Europe : natural resources, manufacturing, supply, life & after-life : proceedings of the international conference 'Roman ornamental stones in north-western Europe : natural resources, manufacturing, supply, life & after-life', Gallo-Roman Museum of Tongeren (Belgium), 20-22 April 2016 - Coquelet, Catherine; Creemers, G. (Guido); Dreesen, Roland; Goemaere, Eric (Agence Wallonne du Patrimoine, AWaP, 2018)