Coba jelasin Lihat juga dari Bahasa Indo-Eropah Purba dalam bahasa melayu dong

At the University of Texas Linguistic Research Center: List of online books, Indo-European Lexicon

Proto-Indo-European Lexicon at the University of Helsinki, Department of Modern Languages, Department of World Cultures, Indo-European Studies

Indo-European Grammar, Syntax & Etymology Dictionary

Academia Prisca: 'Promoting North-West Indo-European as a modern language since 2005, with continuous reference to the parent Late Proto-Indo-European language'.