1. Ammonia emissions and their role in acid deposition;ApSimon;Atmospheric Environment,1987
2. Official UK emission figures agreed for submissions by DoE & MAFF in 1995 between ADAS, Imperial College, IGER and ITE (based on 1993 Census data);DoE,1995
3. The spatial distribution of ammonia emissions in Great Britain for 1969 and 1988 assessed using GIS techniques;Dragosits,1996
4. Fertiliser use on farm crops 1988;Dyer;AFRC (Institute of Arable Crops Research, Rothamstead Experimental Station) report for 1988,1989