Kuhn, Herbert, author
Random House, 1955
Buku Teks
Scheele, William E., author
World Publishing, 1957
Buku Teks
Murray, Raymond W., author
Bruce Publishing, 1943
Buku Teks
Braidwood, Robert J., author
Natural History Museum, 1963
Buku Teks
Braidwood, Robert J., author
Chicago Natural History Museum, 1951
Buku Teks