This bibliography provides a selective listing of both primary and secondary sources dealing with ethnic groups in Pennsylvania history. Books and articles published between 1835 and 1974 are listed for students at the college and high school levels. Materials for 23 separate ethnic groups are provided. These groups include Asians, Dutch, English, Finns, French, Germans, Greeks, Hungarians, Irish, Italians, Jews, Lithuanians, Mexicans, Negroes, Norwegians, Poles, Puerto Ricans, Scots, Scotch-Irish, Slavic groups other than Poles, Swedes, Swiss, and Welsh. Special emphasis is given to materials on Germans and Negroes, with the section on Negroes being divided up into materials dealing with nonslaves and materials discussing slaves. (DE)