P. Williams
发表
Bryan,
P. Williams,
R. Raine,
1979
.
M. MacKinnon,
R. Gershey,
R. Moore,
1979
.
T. Parsons,
L. Albright,
F. Whitney,
1981
.
P. Williams,
J. Derenbach,
1974
.
I. Joint,
R. Jackson,
P. Williams,
1987
.
T. Thingstad,
T. Nielsen,
D. Lefèvre,
1999
.
P. Williams,
C. Askew,
1968
.
J. Davies,
P. Williams,
1984
.
T. E. Cloete,
P. Williams,
P. Williams,
2018,
Water SA.