Columbia subject headings:
Building materials--Turkmenistan--Merv.
Merv (Extinct city)
Monuments--Turkmenistan--Merv.
Vernacular architecture--Turkmenistan--Merv.
Harvard subject headings:
Building materials--Turkmenistan--Merv.
Merv (Extinct city)
Monuments--Turkmenistan--Merv.
Vernacular architecture--Turkmenistan--Merv.
Princeton subject headings:
Architecture, Ancient--Turkmenistan--Merv (Extinct city).
Merv (Extinct city)
Turkmenistan--Antiquities.