Abstract

References
1.
Clerf
L. H.
(1934 ) Laryngoscope, St. Louis , 44 , 568 .
2.
Crooks
J.
(1938 ) Brit. med. J. (i), 935 .
3.
Davidson
M.
(1948 ) Practical Manual of Diseases of the Chest . 3rd Edit. , London .
4.
Davison
F. W.
(1944 ) Ann. Otol. Rhin. Laryng. , 53 , 849 .
5.
Ebbs
J. H.
(1937 ) J. Laryng. , 52 , 849 .
6.
Farrell
J. T.
Jr.
(1936 ) J. Amer. med. Ass. , 106 , 92 .
7.
Fletcher
E.
(1935 ) J. thorac. Surg. , 4 , 460 .
8.
Graham
E. A.
(1931 ) Amer. J. Surg. , 14 , 382 .
9.
Hodge
G. E.
(1935 ) Arch. Otolaryng., Chicago , 22 , 537 .
10.
Hodge
G. E.
(1938 ) J. Laryng. , 53 , 485 .
11.
Jackson
C.
(1918 ) Amer. J. Roentgenol. , 5 , 454 .
12.
Kartagener
M.
Horlacher
A.
(1935 ) Schweiz. med. Wschr. , 65 , 782 .
13.
Kerley
P.
(1936 ) Recent Advances in Radiology . 2nd Edit. , London , 134 .
14.
Lander
F. P. L.
Davidson
M.
, (1938 ) Brit. J. Radiol. , 11 , 65 .
15.
Lemon
W. S.
(1926 ) Med. Clin. N. Amer. , 10 , 531 .
16.
Ormerod
F. C.
(1941 ) J. Laryng. , 56 , 277 .
17.
Philip
W. P.
(1948 ) Brit. med. Ass. Proc. ann. Meet. , p. 118 .
18.
Proetz
A. W.
(1932 ) Ann. Otol. Rhin. Laryng. , 41 , 125 .
19.
Thomson
StC.
(1914 ) Practitioner , 92 , 745 .
20.
Wasson
W. W.
(1929 ) J. Amer. med. Ass. , 93 , 2018 .
21.
Watkins
A. B. K.
(1936 ) Med. J. Aust. (ii), 119 .
22.
Wall
C.
Hoyle
J. C.
(1933 ) Brit. med. J. (i), 597 .
