Columbia subject headings:
Ethnology--Niger.
Ethnology--Nigeria.
Niger--Boundaries--Nigeria.
Nigeria--Boundaries--Niger.
Harvard subject headings:
Ethnology--Niger
Ethnology--Nigeria
Niger--Boundaries--Nigeria.
Nigeria--Boundaries--Niger.
Princeton subject headings:
Ethnology--Niger.
Ethnology--Nigeria.
Niger--Boundaries--Nigeria.
Nigeria--Boundaries--Niger.