W. Johnston
发表
G. Maclachlan,
W. Johnston,
1981,
Veterinary Record.
G. Maclachlan,
W. Johnston,
1982,
Veterinary Record.
J. Sharp,
W. Reilly,
D. Munro,
1981,
Journal of Hygiene.
G. Hopkins,
G. Maclachlan,
W. Johnston,
1979,
Veterinary Record.
J. Miller,
J. Sharp,
W. Reilly,
1983,
Journal of Hygiene.
J. Sharp,
G. Hopkins,
G. Maclachlan,
1986,
Veterinary Record.
J. Miller,
W. Johnston,
J. Miller,
1983
.
D. Deas,
J. T. Vantsis,
W. Johnston,
1966,
Veterinary Record.
C. Wray,
J. Scott,
W. Johnston,
1971,
Veterinary Record.
G. Maclachlan,
W. Johnston,
I. S. Murray,
1980,
Veterinary Record.
G. Maclachlan,
W. Johnston,
1986,
Veterinary Record.
W. Johnston,
1988,
The Veterinary Record.