Contexts and the contextualization of coin finds : proceedings of the Sixth International Colloquium of the Swiss Group for the Study of Coin fields (Geneva, March 5th-7th 2010) = Contextes et contexualisation de trouvailles monétaires = Kontext und Kontextualisierung von Fundmünzen - Frey-Kupper, Suzanne; Stannard, Clive; Wolfe-Jacot, Nathalie (Éditions du Zèbre, 2019)