Abstract

References
1.
Collins
D H
Goldie
W
. (1940 ) J. Path. Bact.
50 , 323
2.
Duthie
I F
Lancaster
M C
. (1964 ) Vet. Rec.
76 , 263
3.
Freeman
M J
Berman
D T
. (1964 ) Amer. J. Vet. Res.
25 , 145 , 151
4.
Grabell
I
Hansen
H J
Olsson
S E
Orstadius
K
Thal
(1962 ) Acta. vet. scand.
3 , 33
5.
Lecce
J G
. (1960 ) Ann. N. Y. Acad. Sci.
79 , 670
6.
Roberts
E D
Switzer
W P
Ramsey
F R
. (1963 ) Amer. J. vet. Res.
24 , 19
7.
Sabec
D
. (1960 ) Inaug. Diss. , Hanover
8.
Von Schilling
E
. (1963 ) Z. Zücht. B
78 , 293
9.
Staun
H
. (1963 ) Acta agric. scand.
13 , 3
