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A. R. Keiler (1972) A reader in historical and comparative linguistics, New York, Rinehart and Winston.
Structuralism
Principles of historical phonology
Roman Jakobson
pp. 121-138
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(1931) "Prinzipien der historischen Phonologie", in: , Réunion Phonologique Internationale tenue à Prague, Praha, Jednota Československých Matematiků a Fysiků, pp.247-267.