Abstract
References
1.
Brinkley
D
Haybittle
J L
(1966 ) Lancet
ii , 291
2.
Kaae
S
Johansen
H
(1959 ) Acta radiol., Stockh . suppl. 188 , p 155
3.
Paterson
R
Russell
M H
(1959 ) J. Fac. Radiol., Lond . 10 , 175
4.
Truscott
B
(1947 ) Brit J. Cancer
1 , 129