1. Armentano, T. V., and C. W. Ralston. 1980. The role of temperate zone forests in the global carbon cycle.Canadian Journal of Forest Research 10:53–60.
2. Bacastow, R. B., and C. D. Keeling. 1973. Atmospheric carbon dioxide and radiocarbon in the natural carbon cycle. II. Changes from A.D. 1700 to 2070 as deduced from a geochemical model. Pages 86–135in G. M. Woodwell and E. V. Pecan (eds.), Carbon and the biosphere. USAEC, Washington, DC.
3. Bacastow, R. B., and C. D. Keeling. 1981. Atmospheric carbon dioxide concentration and the observed airborne fraction. Pages 103–1121in B. Bolin (ed.), SCOPE 16: carbon cycle modelling. John Wiley and Sons, New York.
4. Bolin, B. 1977. Changes of land biota and their importance for the carbon cycle.Science 196:613–615.
5. Broecker, W. S., T. Takahashi, H. J. Simpson, and T.-H. Peng. 1979. Fate of fossil fuel carbon dioxide and the global carbon budget.Science 206:409–418.