King, J.C., W.H. Brune, D.W. Toohey, J.M. Rodriguez, W.L. Starr, and J.F. Vedder (2015), Measurements of ClO and O3 from 21 N to 61 N in the Lower Stratosphere during February 1988: Implications for Heterogeneous Chemistry, Geophys. Res. Lett., 18.12, 2273-2276 (manuscript in preparation).