1
by Carbaugh, Robert J, 1946-
Published 1985
2
by Meerhaeghe, M. A. G. Van
Published 1971
3
by Jalee, Pierre.
Published 1968
4
Published 2003
5
by Noreng, Oystein, 1942-
Published 1978
6
7
by Sethi, J.D, 1924-
Published 1990
8
Published 2006
9
Published 1992
10
11
by Meier, Gerald M.
Published 1968
12
by Isaak, Robert A.
Published 1991
13
Published 2006
14
by Corden, W. M. (Warnex Max)
Published 1992
15
16
by Khor, Martin
Published 2000
17
by Obminsky, Ernest
Published 1988
18
by Williams, Marc
Published 1994
19
by Krugman, Paul R.
Published 2005
20
by Hodgson, John S.
Published 1983