Abstract

References
1.
Bates
J F
Murphy
W M
(1968 ) British Dental Journal
124 , 116
2.
Gould
D G
(1965 ) British Dental Journal
118 , 377
3.
Gray
P G
Todd
J E
Slack
G L
Bulman
J S
(1970 ) Adult Dental Health in England & Wales in 1968 . HMSO , London
4.
Hobdell
M H
Sheiham
A
Cowell
C R
(1969 ) British Dental Journal
128 , 437
5.
Hobdell
M H
Sheiham
A
Slack
G L
(1969 ) British Dental Journal
126 , 349
6.
Jackson
D
(1965 ) British Dental Journal
118 , 158
7.
James
P M C
(1965 ) British Dental Journal
119 , 295
8.
Murray
J J
(1971 ) British Dental Journal
131 , 391
9.
Ramfjord
S P
(1959 ) Journal of Periodontology
30 , 51
10.
Richards
N D
Willcocks
A J
Bulman
J S
Slack
G L
(1965 ) British Dental Journal
118 , 199
11.
Russell
A L A
(1956 ) Journal of Dental Research
35 , 350
12.
Sheiham
A
(1967 ) PhD Thesis, London
13.
Sheiham
A
Hobdell
M H
(1969 ) British Dental Journal
126 , 401
14.
Stahl
S S
Morris
A L
(1955 ) Journal of Periodontology
26 , 180
15.
Swallow
J N
Adams
D
(1967 ) British Dental Journal
123 , 137
