Columbia subject headings:
Geology--Bahrain.
Geomorphology--Bahrain.
Soils--Bahrain.
Harvard subject headings:
Geology--Bahrain.
Geomorphology--Bahrain.
Physical geography--Bahrain.
Soil science--Bahrain.
Soils--Bahrain.
Princeton subject headings:
Geology--Bahrain.
Geomorphology--Bahrain.
Soils--Bahrain.