DISCLAIMER 



"This report was prepared as an account of work sponsored by an agency of the United 

 States Government. Neither the United States Government nor any agency thereof, npr any 

 of their employees, makes any warranty, express or implied, or assumes any legal liability or 

 responsibility for the accuracy, completeness, or usefuhiess of any information, apparatus, 

 product, or process disclosed, or represents that its use would not infringe privately owned 

 rights. Reference herein to any specific commercial product, process, or service by trade 

 name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its 

 endorsement, recommendation, or favoring by the United States Government or any agency 

 thereof. The views and opinions of authors expressed herein do not necessarily state or 

 reflect those of the United States Government or any agency thereof." 



This report has been reproduced directly from the best available copy. 



Available from the National Technical Information Service, U. S. Department of Commerce, Springfield, 

 Virginia 22161. 



Price: Printed Copy A14 

 Microfiche AOl 



Codes are used for pricing all publications. The code is determined by the number of pages in the 

 publication. Information pertaining to the pricing codes can be found in the current issues of the following 

 publications, which are generally available in most libraries: Energy Research Abstracts, (ERA); 

 Government Reports Announcements and Index {GRA and I); Scientific and Technical Abstract Reports 

 (STAR); and publication, NTIS-PR-360 available from (N TIS) at the above address. 



