Columbia subject headings:
Africa--Colonization--History.
Antislavery movements--Niger--Case studies.
Slavery--Africa--History.
Slavery--Niger.
Harvard subject headings:
Africa--Colonization--History.
Antislavery movements--Niger--Case studies.
Slavery--Africa--History
Slavery--Niger.
Princeton subject headings:
Africa--Colonization--History.
Antislavery movements--Niger--Case studies.
Case studies.
Slavery--Africa--History.
Slavery--Niger.