1 23 Archaeological and Anthropological Sciences ISSN 1866-9557 Archaeol Anthropol Sci DOI 10.1007/s12520-019-00885-6 A multi-isotope analysis of Neolithic human groups in the Yonne valley, Northern France: insights into dietary patterns and social structure L. Rey, Domingo C. Salazar-García, P. h. Chambon, F. Santos, S. Rottier & G. Goude