Dibb, J., R. Talbot, B. Lefer, E. Scheuer, G. L. Gregory, E. Browell, J. D. Bradshaw, S. T. Sandholm, and H. Singh (1997), Distributions of beryllium 7 and lead 2109, and soluble aerosol-associated ionic species over the western Pacific: PEM West B, February-March 1994, J. Geophys. Res., 102, 28287-28302, doi:10.1029/96JD02981.