TY  - SER
AU  - Watchman,Alan
TI  - Some observations on the radiocarbon and cosmogenic isotope dating of petroglyphs, Foz Côa, Portugal
KW  - ANTROPOLOGIA
N1  - Antiquity 72 (1999): 197-200
N2  - Further remarks on the age of the Foz Côa rock-engravings, Portugal, in the light of studies by absolute-science methods in the March 1997 ANTIQUITY
ER  -