Columbia subject headings:
Greeks--Turkey--Biography.
Petridēs, Iōannēs Avraam, 1910-2000.
Refugees--Greece--Biography.
Harvard subject headings:
Greeks--Pontus--History--20th century.
Orphans--Greece--Biography.
Petridēs, Iōannēs Avraam, 1910-2000.
Refugees--Greece--Biography.
Princeton subject headings:
Greeks--Pontus--Biography.
Orphans--Greece--Biography.
Petridēs, Iōannēs Avraam, 1910-2000.
Refugees--Greece--Biography.