Abstract
References
1.
Edmondson
H A
(1958 ) Atlas of Tumour Pathology. Armed Forces Institute of Pathology , Washington ; Sect. 7, fasc. 25, p. 24 .
2.
Ewing
J
(1941 ) Neoplastic Disease . London .
3.
Keen
W W
(1892 ) Boston med. surg. J.
126 , 405 .
4.
Warvi
W H
(1944 ) Arch. Path., Chicago
37 , 367 .