Ethnic Groups of Pennsylvania
John E. Bodnar, Ethnic History in Pennsylvania: A Selected Bibliography (Harrisburg: Pennsylvania Historical and Museum Commission, 1974) covers published and manuscript material. Also useful is David E. Washburn, comp. and ed., The Peoples of Pennsylvania: An Annotated Bibliography of Resource Materials (Pittsburgh: University for International Studies, University of Pittsburgh, 1981).
The 'big three' colonial Pennsylvania immigrant groups have all been covered in great detail in published material. Some selected titles are the following:
William Wistar Comfort, The Quakers (University Park: Pennsylvania Historical Association, 1948), while brief, includes a helpful bibliography; see also Albert Cook Myers, Immigration of the Irish Quakers into Pennsylvania, 1682'1750 (1902; reprint, Baltimore: Genealogical Publishing Co., 1969); and Hugh Barbour and J. William Frost, The Quakers (New York: Greenwood Press, 1988).
Emil Meynen, Bibliography on German Settlements in Colonial North America, Especially on the Pennsylvania Germans and Their Descendants, 1683'1933 (1937; reprint, Gale Research Corp., 1966) is useful, and Russell Wieder Gilbert, A Picture of the Pennsylvania Germans (University Park: Pennsylvania Historical Association, 1962) has a bibliography.
John A. Hostetler, Amish Society (Baltimore: Johns Hopkins University Press, 1983) explains the beliefs and practices of this group.
For the Ulster-Scots, see Wayland F. Dunaway, The Scotch-Irish of Colonial Pennsylvania (1944; reprint, Baltimore: Genealogical Publishing Co., 1985); and Charles K. Bolton, Scotch Irish Pioneers of Ulster and America (1910; reprint, Baltimore: Genealogical Publishing Co., 1972).
For information on the early Swedes in Pennsylvania, see the titles listed under Background Sources for Pennsylvania.
Another early immigrant group is covered in Albert Bernhardt Faust and Gaius Marcus Brumbaugh's Lists of Swiss Immigrants in the Eighteenth Century to the American Colonies, 2 vols. in one (1920'25; reprint, Baltimore: Genealogical Publishing Co., 1991).
While not one of the major three immigrant groups, the Welsh have received good treatment in print. See Thomas Allen Glenn, Merion in the Welsh Tract (1896; reprint, Baltimore: Genealogical Publishing Co., 1970) and Welsh Families of Pennsylvania, 2 vols. (1911'13; reprinted in one volume, Baltimore: Genealogical Publishing Co., 1970, 1991). Although known for unreliable publications, Charles H. Browning's Welsh Settlement of Pennsylvania (1912; reprint, Baltimore: Genealogical Publishing Co., 1970) is a worthwhile work. It also includes Welsh Quakers.