The basis for the reconstructed lists for Pennsylvania are the Pennsylvania German Pioneers by Strassburger & Hinke (FHL #974.8 B4pg v.42-44) which includes mostly lists of heads of households or adult men who arrived in Philadelphia from 1727-1808. The following sources are heavily used in the first version of this database because they give extended family information (from German Church records) and include a ship index. They include much more information than what is used in these reconstructed passenger lists and anyone interested should consult them. Links to where they can be purchased are included below:
 

Abbrev.	Authors' Names	Title of Book and Publication Information
Bur1983	Burgert, Annette Kuntzelman	Eighteenth Century Emigrants from German-Speaking Lands to North America, Vol. I: The Northern Kraigau. Breinigsville, Pennsylvania: The Pennsylvania German Society, 1983. [Currently out of print. Annette K. Burgert holds copyright for this volume.]
Bur1985	Burgert, Annette Kuntzelman	Eighteenth Century Emigrants from German-Speaking Lands to North America, Vol. II: The Western Palatinate. Birdsboro, Pennsylvania: The Pennsylvania German Society, 1985.
Bur1989	Burgert, Annette Kuntzelman and Henry Z Jones Jr.	Westerwald to America: Some 18th Century German Immigrants. Camden, Maine: Picton Press, 1989.
Bur1992	Burgert, Annette Kuntzelman	Eighteenth Century Emigrants from the Northern Alsace to America. Camden, Maine: Picton Press, 1992.
Bur1996	Burkett, Brigitte	Emigrants from Baden and Württemberg in the Eighteenth Century. Camden, Maine: Picton Press, 1996.
Bur2000	Burgert, Annette Kuntzelman	Palatine Origins of Some Pennsylvania Pioneers. Myerstown, Pennsylvania: AKB Publications, 2000. [Available from AKB Publications, 691 Weavertown Road, Myerstown, PA 17067-2642.]
Yod1980	Yoder, Don.	Pennsylvania German Immigrants, 1709-1786. Baltimore, Maryland: Genealogical Publishing Co., Inc., 1980. Reprinted from issues of The Pennsylvania German Folklore Society 1936-1951. (Württemberg, Zweibrücken, Schaffhausen, & Wertheim)

The following sources are being added to the online passenger lists but it will take more time since there is no index to the ship names in these books:

Abbrev.	Authors' Names	Title of Book and Publication Information
Hac1980	Hacker, Werner	Auswanderungen aus Baden und dem Breisgau : obere und mittlere rechtsseitige Oberrheinlande im 18. Jahrhundert. Stuttgart: K. Theiss, 1980. (Baden and Breisgau)
Hac1983	Hacker, Werner	Kurpfälzische Auswanderer vom Unteren Neckar : Rechtsrheinische Gebiete der Kurpfalz. Stuttgart: K. Theiss, 1983. (Lower Neckar-Palatinate)
Hac1987	Hacker, Werner	Auswanderungen aus Rheinpfalz und Saarland im 18. Jahrhundert. Stuttgart: K. Theiss, 1987. (Rheinpfalz & Saarland)

The following additional sources will be used in the future and added references from these sources will be included from time to time:

Abbrev.	Authors' Names	Title of Book and Publication Information
FB1920	Faust & Brumbaugh	List of Swiss Emigrants in the Eighteenth Century to the American Colonies. Washington, 1920, 1925. Reprinted by Genealogical Publishing Co., Inc. 1976, 1991. (Zürich Canton 1734-1744, Bern Canton 1706-1795, and Basel Canton 1734-1794)
Boy1980	Carl Boyer Jr.	Ship Passenger Lists: Pennsylvania and Delaware. 1980. (Hessen-Dillenburg, and other articles)
Gieg1988	Ella Gieg	Auswanderungen aus dem Odenwaldkreis. Michelstadt: Neuthor-Verlag, 1988. 5 Vols. (Hessen)

Hopefully others will also bring to our attention connections they may have made or have identified in family histories, through the IGI, from published articles, or other sources which can also be added in the future. Some of the periodicals that should be searched for additional clues in the future include: 
 

	Palatines to America
	National Genealogical Quarterly