Abstract

References
1.
Burkitt
R
(1961 ) Brit. med. J . ii , 938
2.
Clark
D H
(1953 ) Brit. med. J . i , 1254
3.
Durst
J B
&
Klieger
J A
(1955 ) Amer. J. Obstet. Gynec . 70 , 448
4.
Horwich
M
(1958 ) Brit. med. J . ii , 145
5.
James
D W
(1948 ) Brit. med. J . ii , 74
6.
Johnston
J L
(1953 ) Obstet. Gynec. N. Y . 2 , 290
7.
Jones
F A
(1947 ) Brit. med. J . ii , 479
8.
Le Play
A
(1905 ) Cited by Sandweiss et al. (1943 )
9.
Le Winn
E B
(1947 ) Amer. J. Obstet. Gynec . 54 , 114
10.Ministry of Health (1937 ) Report on an Investigation into Maternal Mortality . H.M.S.O. , London ; p 180
11.
Mulsow
F W
&
Brown
WE
(1936 ) Amer. J. Obstet. Gynec . 31 , 1041
12.
Ross
I G
(1958 ) Brit. med. J . ii , 693
13.
Sandweiss
D J
,
Podolsky
H M
,
Saltzstein
H C
&
Farbman
A A
(1943 ) Amer. J. Obstet. Gynec . 45 , 131
14.
Stevenson
I H
(1962 ) Brit. med. J . i , 54
