Columbia subject headings:
Bongo-Bagirmi languages--Classification.
Bongo-Bagirmi languages--Phonology.
Harvard subject headings:
Bongo-Bagirmi languages--Classification.
Bongo-Bagirmi languages--Phonology.
Princeton subject headings:
Bongo-Bagirmi languages--Classification.
Bongo-Bagirmi languages--Phonology.