1
by Vincent
Published 2005
2
3
by Kerlinger
Published 2000
4
Published 2004
5
by Piaw
Published 2012
6
by Piaw
Published 2013
7
by Vincent
Published 2012
8
by O' Donoghue
Published 2015
9
by Pallant
Published 2016
10
by Hedderson
Published 1993
11
by Vincent
Published 1999
12
by Vincent
Published 1999
13
by Vincent
Published 1995
14
by Berry
Published 1993
15
by Girden
Published 1992
16
by Jaccard
Published 1990
17
by Finkel
Published 1995
18
by Weisberg
Published 1992
19
by Sullivan
Published 1979
20
by Schroeder
Published 1986