Herrick, Glenn W. (Glenn Washington), 1870-1965, author
Comstock Publishing Company, 1935
Buku Teks
edited by Bernd Heinrich
John Wiley & Sons, 1981
Buku Teks
Price, Peter W., author
John Wiley & Sons, 1984
Buku Teks
Matthews, E.G., author
University of Queensland Press, 1984
Buku Teks
Saunders, D.S., author
Pergamon Press, 1982
Buku Teks