Simpson, George Gaylord, editor
Fossils and the history of life/George Gaylord Simpson
Scientific American Books , 1983
Buku Teks
The Encyclopedia of animal evolution / edited by R.J. Berry and A. Hallam
Facts on file, 1989
Buku Teks
Life before man / by the editors of Time-Life Book
Time-Life Books, 1972
Buku Teks
Life before man / by the editors of Time-Life Books.
Time-Life Books, 1972
Buku Teks
Raup, David M.
Principles of paleontology/David M. Raup, Steven M. Stanley
W.H. Freeman and Co., 1978
Buku Teks