Abstract

References
1.
Gillespie
N A
. (1948 ) Endotracheal Anæsthesia . 2nd ed. Wisconsin; p 118
2.
Lu
A T
Tamura
Y
Koobs
D H
. (1961 ) Arch. Otolaryng., Chicago
74 , 323
3.
Ransom
S G
. (1947 ) Brit. med. J.
i , 222
4.
Rees
G J
. (1960 ) Brit. J. Anœsth.
32 , 132
5.
Snyder
J J
Gants
R T
. (1953 ) Anesthesiology
14 , 195
