Henderson-Sellers, B.
John Wiley & Sons, 1987
Buku Teks
Bronmark, Christer
Oxford, 2004
Buku Teks
Springer-Verlag, 1990
Buku Teks
National Institute of Ecology and International Scientific, 1982
Buku Teks
Hammer, U. Theodore
Dr. W. Junk, 1986
Buku Teks