Abstract
References
1.
Barker
J R
. (1948 ) Rep. Proc. Conf. Grassl. & anim. Hlth , London , Oct. 28–29. N.V.M.A. publ. No. 17, p 86 .
2.
Begg
H
Whiteford
W A
. (1948 ) Vet. Rec.
60 , 135 .
3.
Blood
D C
. (1962 ) Canad. vet. J.
3 , 40 .
4.
Gregory
P H
Lacey
M E
. (1963 ) J. gen. Microbiol.
30 , 75 .
5.
Jarrett
W F H
McIntyre
W I M
Urquhart
G M
. (1953 ) Vet. Rec.
65 , 153 .
6.
Michel
J F
. (1954 ) Vet. Rec.
66 , 381 .