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^ J. P. Mallory and D. Q. Adams, Encyclopedia of Indo-European Culture, Fitzroy Dearborn Publishers, London and Chicago, 1997, "Jastorf culture"
参考書籍
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Fausto Cercignani, The Development of */k/ and */sk/ in Old English, Journal of English and Germanic Philology, 82/3 (1983), 313-323.
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Joseph B. Voyles: Early Germanic Grammar. London: Academic Press, 1992. ISBN 0-12-728270-X.