Land Snails as a Diet Diversification Proxy during the Early Upper Palaeolithic in Europe Fernández-López de Pablo, Javier ; Badal, Ernestina ; Ferrer García, Carlos ; Martínez-Ortí, Alberto ; Sanchis Serra, Alfred Abstract Publication: PLoS ONE Pub Date: August 2014 DOI: 10.1371/journal.pone.0104898 Bibcode: 2014PLoSO...9j4898F