1. Allen AG, Oppenheimer C, Ferm M, Baxter PJ, Horrocks LA, Galle B, McGonigle AJS, Duffell HJ (2002) Primary sulphate aerosol and associated emissions from Masaya Volcano, Nicaragua. Journal of Geophysical Research, 107(D23)
2. Ammann M, Burtscher H (1993) Aerosol dynamics and light-scattering properties of a volcanic plume. Journal of Geophysical Research 98(B11):19,705?19,711
3. Baxter PJ (2000) Gases. In: Baxter PJ, Adams PH, Aw T-C, Cockcroft A, Harrington JM (eds), Hunter?s diseases of occupations. Arnold, London, pp 123?178
4. Braga ALF, Zanobetti A, Schwartz J (2001) The time course of weather related deaths. Epidemiology, 12(6):662?667
5. Carus W (1847) Memoirs of the life of the Rev. Charles Simeon. Hatchard and Son, London, 847 pp