Current approaches to collective burials in the late European prehistory : proceedings of the XVII UISPP World Congress (1-7 September 2014, Burgos, Spain). Volume 14/session A25b - Tomé, Tiago; Díaz-Zorita Bonilla, Marta; Silva, Ana Maria; Cunha, Claudia; Boaventura, Rui (Archaeopress Publishing Ltd., 2017)