Abstract
References
1.
Day
K. M.
(1940 ) Penn. med. J. , 43 , 1299 .
2.
Ewing
A. W. G.
(1947 ) Practitioner , 158 , 129 .
3.
Hudgins
C. V.
Berry
G.
(1948 ) Ann. Otol. Rhin. Laryng. , 57 , 500 .
4.
Lederer
F. L.
Hardy
W. G.
(1946 ) Arch. Otolaryng., Chicago , 43 , 429 .
5.
MacFarlan
D.
(1948 ) Ann. Otol. Rhin. Laryng. , 57 , 444 .
6.
Silverman
S. R.
(1944 ) Laryngoscope, St. Louis , 54 , 29 .
7.
Thompson
Eva A.
(1946 ) Nav. Med. Bull., Wash. Suppl. March, 216.