Abstract

References
1.
Campbell
R. A.
Cunningham
A. A.
(1941 ) Arch. Dis. Childh. , 16 , 211 .
2.
Cruickshank
R.
(1925 ) J. Hyg. , 24 , 241 .
3.
Frant
S.
Abramson
H.
(1944 ) Brennemann's Practice of Pediatrics , 1 , Hagerstown, Maryland .
4.
Peters
O. H.
(1910 ) J. Hyg. , 10 , 602 .
5.
Smellie
J. M.
(1939 ) Lancet (i ), 969 .
6.
Wallick
H.
Stuart
C. A.
(1943 ) J. Bact. , 45 , 121 .
7.
Wright
G. Payling
Wright
H. Payling
(1945 ) J. Hyg. , 44 , 15 .
8.
Wright
G. Payling
Wright
H. Payling
(1946 ) J. Hyg. , 44 , 480 .
