D. Pym
发表
J. Hassard,
D. Pym,
1994
.
D. Pym,
1980
.
D. Pym,
1966
.
D. Pym,
1980
.
John Hassard,
J. Hassard,
Lloyd E. Sandelands,
1991
.
D. Pym,
1968
.
D. Pym,
1966
.
J. Hassard,
D. Pym,
2012
.