Smith, T. Lynn, author
Louisiana State University Press, 1963
Buku Teks
Artikel Jurnal
Mahoney, Tom, author
Harper & Row, 1966
Buku Teks
Brazilian Academy of Science , 1999
Buku Teks
edited with an introd. by E. Bradford Burns
Alfred A. Knopf, 1966
Buku Teks