1
by Walker, John R., 1924-
Published 2001
2
by Hoffman, Edward G.
Published 1988
3
by Bennett, A. E.
Published 1983
4
by Hj. Mohd. Ayop Hj. Ahmad.
Published 1989
5
by Taylor, David L.
Published 1984
6
by Taylor, David L.
Published 1985