Abstract

References
1.
Allen
A. C.
(1940 ) Arch. Path ., 29 , 589 .
2.
Bolk
(1939 ) Handb. vergleich. Anat. Wirbeltiere . Berlin and Vienna , 1 , 665 .
3.
Dobberstein
J.
Matthias
D.
(1942 ) Arch. wiss. prakt. Tierheilk ., 78 , 18 .
4.
Huggins
C.
Moulder
P. V.
(1944 ) J. exp. Med ., 80 , 441 .
5.
Smythe
R. H.
(1945 ) Vet. Rec , 57 , 115 ;.
6.
Smythe
R. H.
(1946 ) Vet. Rec , 58 , 75 .
7.
Speed
J. G.
(1941 ) Vet. J ., 97 , 252 .
