R D Helliar-Symons
发表
D A Lynam,
R D Helliar-Symons,
1989
.
R D Helliar-Symons,
N R Butler,
1995
.
A H Wheeler,
R D Helliar-Symons,
P P Scott,
1984
.
G Copley,
R D Helliar-Symons,
J Haynes,
1993
.
J Barker,
R D Helliar-Symons,
1997
.
R D Helliar-Symons,
1983
.
R D Helliar-Symons,
R. Helliar-symons,
1981
.
R D Helliar-Symons,
A Irving,
1981
.