Columbia subject headings:
Ali Bey, Yarbay--Correspondence.
Ayşe Hanım--Correspondence.
Ertuğrul (Frigate)
Harvard subject headings:
Ali Bey, Yarbay--Correspondence.
Ayşe Hanım--Corresponcdence.
Ertuğrul (Frigate)
Princeton subject headings:
Ali Bey, Yarbay--Correspondence.
Ayşe Hanım--Corresponcdence.
Ertuğrul (Frigate)