Official Records
The records of the U.S. Circuit Courts for the Districts of Pennsylvania are included among Record Group 21 at the:
National Archives at Philadelphia
900 Market Street
Philadelphia, Pennsylvania 19107-4292
Email: philadelphia.archives@nara.gov
A guide to the holdings of the regional archives is available at: https://www.archives.gov/philadelphia/finding-aids
A published description of the records is also available in the Guide to Federal Records in the National Archives of the United States, 1995 (http://www.archives.gov/research/guide-fed-records/index.html ).
Bibliography
The Academy of Trial Lawyers of Allegheny County. The Federal Court System in Western Pennsylvania. May 1972.
Presser, Stephen B . Studies in the History of the United States Courts of the Third Circuit. Washington, DC: U.S. Government Printing Office, 1982.