1
by Frankel, Joseph
Published 1963
2
3
by Kotler, Philip
Published 2000
4
Published 1999
5
by Jepma, Catrinus J.
Published 1998
6
by Weimer, David Leo
Published 1992
7
by Young, George K.
Published 1962
8
by Hutson, Don.
Published 2010
9
by Woodward, Bob
Published 1991
10
11
Published 1992
12
Published 1989
13
14
15
16
Published 1964
17
18
19
Published 1992
20
by Atrill, Peter
Published 2005