Columbia subject headings:
Human ecology--Environmental aspects--Tanzania--Usambara Mountains.
Land use--Tanzania--Usambara Mountains.
Shambala (African people)--Tanzania--Usambara Mountains.
Harvard subject headings:
Agriculture--Environmental aspects--Tanzania--Usambara Mountains.
Land use--Tanzania--Usambara Mountains.
Shambala (African people)--Tanzania--Usambara Mountains.
Princeton subject headings:
Agriculture--Environmental aspects--Tanzania--Usambara Mountains.
Land use--Tanzania--Usambara Mountains.
Shambala (African people)--Tanzania--Usambara Mountains.