There were a lot of Bohemians that moved to Texas, as well. Chris Strachwitz' documented a lot of this in his album notes for a lot of the Conjunto music that he released on Arhoolie--also. it seems to me that Les Blank discussed it a bit in his documentary on Norteno music--the name, I can't remember--There were many German immigrants to Mexico--When I lived in PA, I was amazed to discover that many of the PA Dutch had sister communities that they continued to be contected to in Mexico--