1
2
by Porter, Michael E.
Published 1990
3
by Cherry, Judith
Published 1993
4
5
by Ozcan, Gul Berna
Published 1995
6
by Tomasevski, Katarina
Published 1997
7
by Fitzgerald, E. V. K, 1947-
Published 1989
8
by Koch, A. Robert
Published 1986
9
by Boserup, Ester
Published 1990
10
11
Published 1995
12
by Ray, S. K.
Published 1993
13
Published 1994
14
Published 1989
15
by Hettne, Bjorn
Published 1990
16
Published 1992
17
Published 1994
18
19
by Simpson, E. S.
Published 1987
20
by Coates, David
Published 1994