61
62
by Dowler, Warwick
Published 2005
63
64
65
by Clammer, John
Published 1996
66
by Pindyck, Robert S.
Published 1998
67
by Schotter, Andrew R.
Published 1997
68
by Bierman, H. Scott
Published 1998
69
70
by Steinberg, Laurence
Published 1993
71
by Colander, David C.
Published 1995
72
by Lipsey, Richard G.
Published 1992
73
74
by Parkin, Michael.
Published 2000
75
by Case, Karl E.
Published 1999
76
Published 1992
77
78
by Sloman, John
Published 2000
79
by Sloman, John
Published 1999
80