1. Preparation of glass fibre filters for sulphuric acid aerosol collection;Barton;Environ. Sci. Technol.,1970
2. Proceeding of the OECE—Symposium on the Compounds in the Atmosphere and the formation of Acid Smogs;Dubois,1967
3. The determination of sulphuric acid in air: a specific method;Dubois;Microchim. acta,1969