Example image of eyePlorer eyePlorer map for 'Grundriß der vergleichenden Grammatik der indogermanischen Sprachen': Berthold Delbrück Comparative linguistics Historical linguistics Indo-European languages Karl Brugmann Morphology (linguistics) Phonology Syntax Proto-Indo-European August Schleicher Franz Bopp Indo-European studies Neogrammarian Joseph Wright (linguist) W. H. D. Rouse Helmut Rix Indo-European Etymological Dictionary Indogermanisches etymologisches Wörterbuch Julius Pokorny Lexikon der indogermanischen Verben Proto-Indo-European language Proto-Indo-European phonology Mass comparison
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