Credits
Images obtained from:
- (Alps images) Walking Softly
- RockArt.net
- Crystal links Petroglyphs
- Valtellina and Valcamonica rock art
- I centri urbani
- (Sardinia) Stone of Italy
- Sardinia Point
- (Tuscany) Prehistoric Petroglyphs at Sasso delle Fate
- Statues-Stelea Home page
- (Portugal & Spain) www.Archaeology.org; Portuguese petroglypgh
- Página Pessoal de António Jerónimo
- (Algeria) Rock art in Tassili-n-Ajjer
- (Libya) Libyan Rock Art
- Acacus: Italian-Libyan Archaeological mission
More information, images and tracings can be found at:
- Bradshaw Foundation *****
- Valtellina petroglyphs dated
- EuroPreArt
- similarities in petroglyphs
- Val Camonica at Wikipedia.org
- Valtellina
- Early Labrynths: Sardinia
- Sardinia, a travel guide
- Sardegna
- Prehistoric petroglyphs in Italy: "The Rock of the Fairies"
- Portugal Coa valley
- World Heritage sites in Portugal
- Trust for African Rock Art (TARA)