![Background trace gas concentrations in the central United States]()
Background trace gas concentrations in the central United StatesBreeding, R. J.; Lodge, J. P.; Pate, J. B.; Sheesley, D. C.; Klonis, H. B.; Fogle, B.; Anderson, J. A.; Englert, T. R.; Haagenson, P. L.; McBeth, R. B.; Morris, A. L.; Pogue, R.; Wartburg, A. F. · Journal of Geophysical Research · 1973