NASA - National Aeronautics and Space Administration

Ridley, B., M. A. Carroll, D. D. Dunlap, M. Trainer, G. Sachse, G. L. Gregory, and E. P. Condon (1989), Measurements of NOx over the Eastern Pacific Ocean and Southwestern United States During the Spring 1984 NASA GTE Aircraft Program, J. Geophys. Res., 94, 5043-5067.