2157.
Harvey
(Anthony): Some significant points of early Insular Celtic orthography.
In
Sages, saints and storytellers [Fs. Carney]
(1989), pp. 56–66.
Investigates the origin of the use of the digraphs
th
,
ch
and
ph
for the fricatives /θ/, /χ/ and /f/ (or /ɸ/).
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Classifications:
E 3 SCRIPT AND ORTHOGRAPHY