This report was prepared by Hughes Aircraft Company, Culver City, California under Contract Number F33615-70-C-1348. The work was administered under the direc tion of the Air Force Materials Laboratory, Air Force Systems Command, Wright Patterson Air Force Base, Ohio, with Mr. B. Emrich, Project Engineer. The Electronic Properties Information Center (EPIC) is a designated Information Analysis Center of the Department of Defense authorized to provide information to the entire DOD community. The purpose of the Center is to provide a highly competent source of information and data on the...