Kuhn, Herbert
On the track of prehistoric man
Random House, 1955
 Buku Teks
Scheele, William E.
Prehistoric man and the primates
World Publishing, 1957
 Buku Teks
Braidwood, Robert J.
Prehistoric men
Natural History Museum, 1963
 Buku Teks
Braidwood, Robert J.
Prehistoric men
Chicago Natural History Museum, 1951
 Buku Teks
Edel, May
The story of our ancestors
Little, Brown, 1955
 Buku Teks