Braidwood, Robert J.
Chicago Natural History Museum, 1951
Buku Teks
Kuhn, Herbert
Random House, 1955
Buku Teks
Scheele, William E.
World Publishing, 1957
Buku Teks
Murray, Raymond W.
Bruce Publishing, 1943
Buku Teks
Chakravarti, S.N.
Order Of The Trustees, 1950
Buku Teks