1
Published 1977
2
Published 2004
3
Published 1992
4
Published 1986
5
6
Published 1994
7
by Hawkins, Joyce M.
Published 2006
8
by Oey, Thomas G.
Published 2004
9
Published 1993
10
by Ramos, Teresita V.
Published 1971
11
by Forst, Gabriele
Published 1995
12
by Cuyas, Arturo y Antonio
Published 1992
13
Published 1984
14
by Nguyen, Dinh-Hoa
Published 1991
15
by Hava, J. G.
Published 2001
16
Published 2006
17
Published 2001
18
Published 2009
19
Published 2009
20