Columbia subject headings:
Harvard subject headings:
Cities and towns, Medieval--Greece--Grevena (Nome).
Cities and towns, Medieval--Greece--Kozanē (Nome).
Grevená (Greece)
Kozanē (Greece)
Siatista (Greece)
Velventos (Greece)
Princeton subject headings:
Cities and towns, Medieval--Greece--Grevena Region.
Cities and towns, Medieval--Greece--Kozanē Region.
Grevena (Greece : Nome)--Population--Sources.
Kozanē Region (Greece)--Population--Sources.