Columbia subject headings:
Harvard subject headings:
Forests and forestry--Djibouti.
Forests and forestry--Ethiopia
Forests and forestry--Somalia.
Trees--Djibouti--Geographical distribution.
Trees--Ethiopia--Geographical distribution.
Trees--Somalia--Geographical distribution.
Princeton subject headings:
Forests and forestry--Africa, Northeast.
Trees--Africa, Northeast--Classification.
Trees--Tropics--Classification.