County of Centre v. Musser ( 1988 )
Fraternal Order of Police, Lodge No. 5 v. City of Philadelphia ( 1991 )
Penn-Delco School District v. Urso ( 1978 )
Philadelphia Housing Authority v. Union of Security Officers 1 ( 1983 )
Board of Education of the School District v. Philadelphia Federation of Teachers Local No. 3 ( 1975 )
City of Philadelphia v. Fraternal Order of Police, Lodge No. 5 ( 1989 )