P. R. Barker
发表
L. N. Wright,
P. R. Barker,
1963
.
John Twidell,
V. O. Shestopal,
P. R. Barker,
1983
.
P. R. Barker,
D. Moncrieff,
1978
.
P. R. Barker,
1975
.
P. R. Barker,
D. Hutton,
1973,
December 1.
P. R. Barker,
1955
.
P. R. Barker,
V. Robinson,
D. Moncrieff,
1979
.