Abstract
Get full access to this article
View all access options for this article.
References
1.
Dean, H.T.
, et al (1942 ). Publ. Hlth Rep.
57 , 1155 .
2.
Russell, A.L.
and
Elvove, E.
(1951 ). Pub. Hlth Rep.
66 , 1389 .
3.
Arnold, F.A.
, et al (1956 ). Publ. Hlth Rep.
71 , 652 .
4.
Ast, D.B.
, et al (1956 ) J. Amer. dent. Ass.
52 , 314 .
5.
Hutton, W.L.
, et al (1956 ). Canada J. Pub. Hlth.
47 , 89 .