- Indo-European languages--Grammar, Comparative (28)
- Comparative linguistics (9)
- Indo-European philology--Bibliography (4)
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- Medicine--Terminology (2)
- Romance languages--Grammar, Comparative--Collected works (2)
- Sanskrit language--Dictionaries--Polyglot (2)
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- Uralic languages--Grammar, Comparative--Indo-European (2)
- Anatolian languages--Grammar, Comparative (1)
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- Balts (Indo-European people) (1)
- Bopp, Franz, 1791-1867 (1)
- Burushaski language--Etymology (1)
- Burushaski language--Grammar, Comparative--Indo-European (1)
- Caucasian languages (1)
- English language--Old English, ca. 450-1100 (1)
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- Indo-European Languages--Grammar--Comparative (1)
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- Indo-European languages--Grammar, Comparative --Urartian (1)
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- Indo-European languages--Grammar, Comparative--Khoisan languages (1)
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- Khoisan languages--Grammar, Comparative--Indo-European (1)
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- Nostratic hypothesis (1)
- Reconstruction (Linguistics) (1)
- Russia (Federation)--Languages (1)
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- Semantics, Comparative (1)
- Semitic languages--Grammar, Comparative--Indo-European (1)
- Slavic languages--Grammar, Comparative--Finno-Ugric (1)
- Slavic languages--Grammar, Comparative--Indo-European (1)
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- Uralic languages--Declension (1)
- Urartian language--Grammar, Comparative--Indo-European (1)