1
Published 1992
2
by Husted, Steven L.
Published 2007
3
by Lindert, Peter H.
Published 1986
4
by Husted, Steven L.
Published 1995
5
by Jepma, C.J.
Published 1996
6
by Brown, Wilson B, 1938-
Published 1994
7
by Gilpin, Robert
Published 1987
8
by Evans, John W.
Published 1971
9
by Gill, Stephen, 1950 -
Published 1988
10
by Fawcett, J. E. S, 1913-
Published 1977
11
by Williams, Marc
Published 1994
12
Published 1994
13
by Navarro, Peter
Published 2007
14
by Walther, Ted
Published 1997
15
Published 1985
16
Published 1996
17
Published 2007
18
Published 1994
19
Published 1969
20
by Williamson, John
Published 1991