Columbia subject headings:
Harvard subject headings:
Explorers--Iran.
Iran--History.
Iranian literature--Foreign countries--History and criticism.
Travelers' writings, German--Iran.
Zoroaster--Influence.
Princeton subject headings:
Explorers--Iran.
Iran--History.
Iranian literature--Foreign countries--History and criticism.
Travelers' writings, German--Iran.
Zoroaster--Influence.