Abstract

References
1.
Beard
R W
Morris
E D
Clayton
S G
. (1966 ) J. Obstet. Gynœc. Brit. Cwlth
73 , 860 .
2.
Chamberlain
G
. (1966 ) Brit. J. Clin. Pract . 20 , 15 .
3.
Morris
E D
Beard
R W
. (1965 ) J. Obstet. Gynæc. Brit. Cwlth
72 , 489 .
4.
Saling
E
. (1962 ) Arch. Gynäk . 197 , 108 .
