Columbia subject headings:
Minorities--Pennsylvania--Audio-visual aids--Catalogs.
Minorities--Pennsylvania--Bibliography.
Pennsylvania--Ethnic relations--Bibliography.
Harvard subject headings:
Minorities--Pennsylvania--Audio-visual aids--Catalogs.
Minorities--Pennsylvania--Bibliography.
Pennsylvania--Ethnic relations--Bibliography.
Princeton subject headings:
Minorities--Pennsylvania--Audio-visual aids--Catalogs.
Minorities--Pennsylvania--Bibliography.
Pennsylvania--Ethnic relations--Bibliography.