blue helmets under fire : fifty years of United Nations peacekeeping missions / Samuel M. Katz and Yves Debay ; editor: James R. Hill research study National security and individual freedom / H.D. Lasswell Formulas for stress and strain / Raymond J. Roark Radio engineering / by Frederick Emmons Terman Principles of radar / by members of the staff of the Radar School Massachusetts Institute of Technology Communication engineering / by William Littell Everitt
