Columbia subject headings:
Harvard subject headings:
Badakhshān (Afghanistan)--Discovery and exploration.
Discoveries in geography
Espionage--Afghanistan--Badakhshān.
Espionage--Afghanistan--Vākhān (Region)
Vākhān (Afghanistan : Region)--Discovery and exploration.
Princeton subject headings:
Badakhshān (Afghanistan)--Discovery and exploration.
Discoveries in geography.
Espionage--Afghanistan--Badakhshān.
Espionage--Afghanistan--Vākhān (Region).
Vākhān (Afghanistan : Region)--Discovery and exploration.