Signs of Which Times? Chronological and Palaeoenvironmental Issues in the Rock Art of Northern Africa

Reference: 

HUYGE, D. & VAN NOTEN, F. & SWINNE, D. (Eds.)
Signs of Which Times? Chronological and Palaeoenvironmental Issues in the Rock Art of Northern Africa
International Colloquium, Brussels, 3-5 June 2010
( 377 pp., 2012)