Abstract
References
1.
Doll
E R
Bryans
J T
McCollom
WH
Crowe
M E W
(1957 ) Cornell Vet.
47 , 3
2.
Mahaffey
L W
(1966a ) Proc. R. Soc. Med.
59 , 54
3.
Mahaffey
L W
(1966b ) I Int. Conf. Equine infect. Dis., Stresa (in press)
4.
Plummer
G
Waterson
A P
(1963 ) Virology
19 , 412