TransliterationEtimologicheskiy slovar slavyanskikh yazykov. Praslavyanskiy leksicheskiy fond. Vypuski 1-21, 23-39, 41, 42.
In EnglishEtymological Dictionary of Slavic Languages. Praslav Vocabulary Foundation. Issues 1-21, 23-39, 41, 42. In Russian
$999