Foundations of bridges and buildings / by Henry S. Jacoby and Roland P. Davis Materials handbook : an encyclopedia for purchasing agents, engineers, executives, and foremen / George S. Brady radio communication series Radio direction finders / by Donald S. Bond radiation laboratory series Radar aids to navigation / ed. by John S. Hall research study National security and individual freedom / H.D. Lasswell blue helmets under fire : fifty years of United Nations peacekeeping missions / Samuel M. Katz and Yves Debay ; editor: James R. Hill