1
2
Published 1961
3
by Ma
Published 1968
4
by Hara
Published 1997
5
by Gilmore
6
7
Published 2005
8
by Lee
Published 1986
9
Published 2006
10
11
by Gan
Published 1998
12
Published 1984
13
Published 1981
14
by Bogaars
Published 1956
15
by Chen-Tung Chang
Published 1974
16
by Tan Chee Beng
Published 1993
17
18
by Craig
Published 1979
19
by Djamour
Published 1959
20
by Lim
Published 2002