1. Five towns survey of kerbside air pollution, V: Data digest for Stratford Road, Birmingham;Apling,1979
2. Vehicular pollution in car parks;Barker;J.R. Soc. Health,1976
3. The preparation of standard gas mixtures;Barratt;Analyst, Lond.,1981
4. Dispersion of traffic carbon monoxide in urban centres;Bayley;Traff. Engng & Control,1976