Abstract

References
1.
Ashford
J R
Brown
S
Morgan
D C
Rae
S
. (1968 ) Amer. Rev. resp. Dis.
97 , 810 .
2.Ciba Guest Symposium (1959 ) Thorax
14 , 286 .
3.
Cochrane
A L
Higgins
I T T
. (1961 ) Brit. J. prev. soc. Med.
15 , 1 .
4.
Collis
E L
. (1915 ) Publ. Hlth (Lond.)
28 , 252 .
5.
Cotes
J E
. (1965 ) Lung Function: Assessment and Application in Medicine . Oxford.
6.
Enterline
P E
. (1967 ) Arch. environm. Hlth
14 , 189 .
7.
Gilson
J C
. (1963 ) In: Mineral Dust in Industry . HMSO , London ; p 44 .
8.
Haldane
J S
Haynes
F
Shaw
A
Graham
J I
. (1938 ) Trans. Instn min. Engrs (Lond.)
97 , 40 .
9.
Heasman
M A
Liddell
F D K
Reid
D D
. (1958 ) Brit. J. industr. Med.
15 , 141 .
10.
Higgins
I T T
. (1970 ) In: International Symposium on Bronchitis Groningen 1969. Ed.
Orie
N G M
Sluiter
H J
. (in press).
11.
Higgins
I T T
Cochrane
A L
. (1961 ) Brit. J. industr. Med.
18 , 93 .
12.
Higgins
I T T
Cochrane
A L
Gilson
J C
Wood
C H
. (1959 ) Brit. J. industr. Med.
16 , 255 .
13.
Higgins
I T T
Cochrane
A L
Oldham
P D
Gilson
J C
. (1956 ) Brit. med. J.
ii , 904 .
14.
Higgins
I T T
Higgins
M W
Lockshin
M D
Canale
N
. (1968 ) Brit. J. industr. Med.
25 , 165 .
15.
Hill
A B
. (1965 ) Proc. roy. Soc. Med.
58 , 295 .
16.
Lowe
C R
. (1968 ) Proc. roy. Soc. Med.
61 , 98 .
17.
Lowe
C R
Campbell
H
Khosla
T
. (1970 ) Brit. J. industr. Med.
27 , 121 .
18.
Davies
T A Lloyd
. (1970 ) Report of the Survey of Respiratory Disease in Foundrymen . HMSO , London (in press).
19.
Meadows
S H
. (1961 ) Brit. J. prev. soc. Med.
15 , 171 .
20.Medical Research Council (1966 ) Brit. med. J.
i , 101 .
21.Ministry of Pensions and National Insurance (1965 ) Report into the Incidence of Incapacity for Work, Part II . HMSO , London .
22.
Molyneux
M K B
Tombleson
J B L
. (1970 ) Brit. J. industr. Med.
27 , 225 .
23.
Oldham
P D
. (1968 ) Measurement in Medicine . London.
24.
Parsons
W D
de Villiers
A J
Bartlett
L S
Becklake
M R
. (1964 ) Brit. J. industr. Med.
21 , 110 .
25.
Pemberton
J
. (1968 ) Proc. roy. Soc. Med.
61 , 95 .
26.
Rossiter
C E
Rivera
D
Bergman
I
Casswell
C
Nagelschmidt
G
. (1967 ) In: Inhaled Particles and Vapours II . Ed.
Davies
C N
. Oxford; p 419 .
27.Royal College of Physicians (1970 ) Air Pollution and Health . London.
28.
Schilling
R S F
Hughes
J P W
Dingwall-Fordyce
I
Gilson
J C
. (1955 ) Brit. J. industr. Med.
12 , 217 .
29.
Sluis-Cremer
G K
Walters
L G
Sichel
H S
. (1967 ) Brit. J. industr. Med.
24 , 1 .
30.
Sluis-Cremer
G K
. (1970 ) In: Proceedings of Pneumoconiosis Conference , Johannesburg 1969 (in press).
31.
Warner
C G
Davies
G M
Jones
J G
Lowe
C R
. (1969 ) Ann. occup. Hyg.
12 , 151 .
