Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Prehistoric Rock Art Sites in the Côa Valley and Siega Verde' has mentioned 'Iron Age' in the following places:
Occurrence Sentence Text Source
[6][7][8] Later, Antxc3xb3nio Martinho Baptista would determine that Iron Age carvings corresponded to works by Celtic-Iberian tribes, specifically the Medobrigenais or Zoilos.
There are also Iron Age sites along the mouth of the Cxc3xb4a in the valleys of smaller Douro river tributaries.