1. Beardsmore, D. J., Pearman, G. I., and Zwack, P. R., 1985, Atmospheric carbon dioxide measurements in a semi-urban locality, Clean Air 19 123?127.
2. Bischof, W., Borchers, R., Fabian, P., and Kruger, B. C., 1985, Increased concentration and vertical distribution of carbon dioxide in the stratosphere, Nature 316, 708?710.
3. Blake, D. R., Woo, V. H., Tyler, S. C., and Rowland, F. S., 1984, Methane concentrations and source strengths in urban locations, Geophys. Res. Lett. 11, 1211?1214.
4. Bodhaine, B. A., Dutton, E. G., DeLuisi, J. J., Herbert, G. A., Shaw, G. E., and Hansen, A. D. A., 1988, Barrow surface aerosol: An update through 1986, J. Atmos. Chem., this issue.
5. Bodhaine, B. A., 1983, Aerosol measurements at four background sites, J. Geophys. Res. 88, 10753?10768.