Symbolism in rock art : edited by Fernando Coimbra, Léo Dubal.
International Congress of Prehistoric and Protohistoric Sciences(15th :2006 :Lisbon, Portugal)
Coimbra, Fernando.
Dubal, Léo,1940-
International Union of Prehistoric and Protohistoric Sciences.
Oxford : Archaeopress,
2008.
Includes bibliographical references.
Rock paintings
Petroglyphs