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  1. 1
    by Leakey, Louis S. B.
    published 1977
    Book
  2. 2
    by Leakey, Louis S. B.
    published 1977
    Book
  3. 3
  4. 4
    by Krieger, Albert
    published 1921
    Book
  5. 5
    Book
  6. 6
    by Williams, Francis E.
    published 1924
    Book
  7. 7
  8. 8
    by Hartmann, Richard
    published 1944
    Book
  9. 9
  10. 10
    by Ayisi, Eric O.
    published 1972
    Book
  11. 11
    published 2007
    Volume Cartographic Image
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
    by Malinowski, Bronislaw
    published 1949
    Book
  17. 17
  18. 18
    by Kollewijn, Roeland Duco
    published 1953
    Book
  19. 19
  20. 20