Columbia subject headings:
Middle East--Description and travel--Bibliography.
Travelers--Middle East--Bibliography.
Travelers--Soviet Union--Bibliography.
Harvard subject headings:
Middle East--Description and travel--Bibliography.
Travelers--Middle East--Bibliography.
Travelers--Soviet Union--Bibliography.
Princeton subject headings:
Balkan Peninsula--Description and travel--Bibliography.
Christian pilgrims and pilgrimages--Middle East--Bibliography.
Middle East--Description and travel--Bibliography.
Travelers--Middle East--Bibliography.
Travelers--Soviet Union--Bibliography.