NOTICE This report was prepared as an account of work sponsored bv the United Staces Government. Neither the United States nor che Unicea Scates Deparement of Energy DOE). nor anvof ther emplovees. nor anv oftheir contractors. suocontractors. or their empiovees. Makes anv warranty. express or implied. or assumes anviegai liabiiitv or responsibtiitv for the accuracy. completeness of usetuiness of anv informauon. apparatus. product or process aisciosea. or represencs that its use would not inininge privarety owned nights. Printed in the United Seaces of America Avatiabie from Nauonai Teehnicai [nrormauon Service U.S. Department of Commerce 3285 Port Roval Road Spnnegneid. VA 22161 Price: Printea Copy 34.30: Micronche 33.00 April 1978 363 copies