Palfreman, David, author
Pitman , 1986
Buku Teks
Palfremen, David, author
Pitman, 1988
Buku Teks
Hall, Ford P.
McGraw-Hill Book Company , 1949
Buku Teks
edited by R.B. Bucat
Australian Academy of Science, 1984
Buku Teks
Home, Henry, author
Liberty Fund, INC., 2005
Buku Teks