Lane, D.J. & Storr, A. (1979). Asthma: the facts. Oxford Medical Publications.
2.
Macdonald, J.B., Macdonald, E.T., Seaton, A. & Williams, D.A. (1976). Asthma deaths in Cardiff. 53 deaths in hospital. British Medical Journal2: 721-723.
3.
Inman, W.H.W. & Adelstein , A.M. (1969) Rise and fall of asthma mortality in relation to the use of pressurised aerosols . Lancet2 : 279-285.
4.
Hirst, J.M. (1952) An automatic volumetric spore trap. Annals of Applied Biology , 39: 257-265.
5.
Gregory, P.H. (1973) The microbiology of the atmosphere. Leonard Hill, Aylesbury. 2nd Ed.
6.
Jackson, F.A.Personal communication.
7.
Adams, K.F. & Hyde, H.A. (1965). Pollen grains and fungal spores, indoors and out at Cardiff. Journal of Palynology , 1: 67-69.
8.
Mullins, J. (1973) The Ecology of Aspergillus fumigatus (Fres) Ph.D Thesis. University of Wales.