Abstract
References
1.
Braden
M
(1966 ) Dent. Practit. dent. Rec.
16 , 301 .
2.
Wilson
H J
(1966 ) Brit. dent. J. (in press).
3.
Wilson
H J
Tomlin
H R
Osborne
J
(1966 ) Brit. dent. J.
121 , 9 .