Proto-Germanic

Proto-Germanic Root Languages

• Proto-Indo-European

Proto-Germanic Branch Languages

Proto-Germanic Linguistics Book

• A Handbook of Germanic Etymology
• A History of English: Volume I: From Proto-Indo-European to Proto-Germanic (A Linguistic History of English)

Proto-Germanic Linguistics Web Bibliography

• Proto-Germanic On Wikipedia
• Germanic Lexicon Project

Proto-Germanic Linguists

• Don Ringe