1. Campbell, J. M.: Acute symptoms following work with hay. Brit. med. J.1932 II, 1143.
2. Ramizzini, B.: De Morbus Artificum Deatriba, 1713. Published by the University of Chicago Press. Chicago, 1940.
3. Arlidge, J. T.: The diseases of occupations. London 1892.
4. Fawcitt, R.: Fungoid conditions of lungs. Brit. J. Radiol.9, 172 (1936).
5. Duncan, J. T.: Survey of fungus diseases in Great Britain: Results from first eighteen months. Brit. J.1945 II, 715.