1. Berkner, L.V., and Marshall, L.C. Origin and Evolution of the Oceans and Atmosphere, P.J. Brancazio and A.G.W. Cameron (eds.), J. Wiley and Sons: N.Y. 1964, 102
2. Berkner, L.V., and Marshall, L.C., J. Atm. Sci. 22:225 (1965).
3. Berkner, L.V., and Marshall, L.C., J. Atm. Sci. 23:133 (1966).
4. Cloud, P. Econ. Geol. 68:1135 (1973).
5. Sagan, C. J. Theor. Biol. 39:195 (1973).