SUBJECT
Geology
5
Mines and mineral resources
3
Congresses
2
Paleontology
2
Africa
1
Animal ecology
1
Bibliography
1
Bone
1
Carbonatites
1
Cynodontia
1
Desertification
1
Earthquakes
1
Geology -- Africa, East
1
Geology, Stratigraphic
1
Geology, Stratigraphy
1
Geomorphology
1
Geomorphology -- Africa
1
Human evolution
1
Landforms
1
Mineral industries
1
Nephelinite
1
Prehistoric peoples
1
Rifts (Geology)
1
Rifts (Geology) -- Africa, East
1
Savannas
1
Volcanism
1
Water - supply
1
Water-supply - Africa
1
Water-supply - Handbooks, manuals, etc
1