1
by Gilpin, Robert
Published 1987
2
by Evans, John W.
Published 1971
3
Published 1994
4
by Navarro, Peter
Published 2007
5
by Gill, Stephen, 1950 -
Published 1988
6
by Fawcett, J. E. S, 1913-
Published 1977
7
by Williams, Marc
Published 1994
8
by Walther, Ted
Published 1997
9
Published 1996
10
Published 1995
11
Published 1995
12
Published 1994
13
by Garnaut, Ross
Published 1994
14
Published 1992
15
by Husted, Steven L.
Published 2007
16
by Lindert, Peter H.
Published 1986
17
by Husted, Steven L.
Published 1995
18
by Jepma, C.J.
Published 1996
19
by Brown, Wilson B, 1938-
Published 1994
20
Published 1985