Text this: Cosmic x-ray physics : semi-annual status report to the National Aeronautics and Space Administration, January 1, 1986 - June 30, 1986 / submitted by the Space Physics Group, Physics Department, the University of Wisconsin ; D. McCammon, principal investigator, W.L. Kraushaar, co-investigator, D.P. Cox, co-investigator, W.T. Sanders, co-investigator.