Pierce, Marc, Hans C. Boas and Karen Roesch (2015) The history of front rounded vowels

Pierce, Marc, Boas, Hans C., and Karen Roesch. 2015.  “The history of front rounded vowels in New Braunfels German.” In: J.B. Johannessen and J.C. Salmons (eds.), Germanic Heritage Languages in North America. Amsterdam/Philadelphia: John Benjamins. 118–131. [ PDF ]