1
by Bhagawati, Jagdish N, 1934-
Published 1966
2
Published 1994
3
Published 1987
4
Published 2004
5
by Nafziger, E. Wayne
Published 1984
6
by Ahrens, Joachim, 1963-
Published 2002
7
Published 1999
8
by Fieldhouse, D.K, 1925
Published 1999