Columbia subject headings:
Inscriptions, Celtic--British Isles.
Inscriptions, Celtic--France--Brittany.
Ogham alphabet.
Harvard subject headings:
Inscriptions, Celtic--British Isles.
Inscriptions, Celtic--France--Brittany.
Ogham alphabet.
Princeton subject headings:
Inscriptions, Celtic--British Isles.
Inscriptions, Celtic--France--Brittany.
Ogham alphabet.