Columbia subject headings:
Harvard subject headings:
Greece--Societies, etc.
Princeton subject headings:
Philikē Hetaireia--Archives.
Philikē Hetaireia--History--Sources.
Revolutionaries--Greece--Correspondence.
Sekerēs, Panagiōtēs, 1785-1846--Archives--Catalogs.
Sekerēs, Panagiōtēs, 1785-1846--Correspondence.