Abstract

References
1.
Ashworth
H W
(1959 ) Med. World
90 , 435
2.
Ashworth
H W
(1960 ) MD Thesis . Manchester
3.
Buzzard
R B
Shaw
W J
(1952 ) Brit. J. industr. Med.
9 , 275
4.
Fortuin
G J
(1955 ) Bull. Wld. Hlth Org . 13 , 513
5.Hearts of Oak Journal (1957 ) 41 , 185
6.
Mayo
E
(1945 ) The Social Problems of an Industrial Civilisation . Boston
