Natural processes in the degradation of open-air-rock-art sites : an urgency intervention scale to inform conservation : the case of the Côa Valley world heritage site, Portugal

von Fernandes, António Pedro Martins da Mota Batarda.
BAR international series ; 2609
Oxford : Archaeopress, 2014.
Umfang/Format: xv, 311 p. : ill., maps, charts ; 30 cm.