The contents of this report are not to be used for advertising, 
publication, or promotional purposes. Citation of trade names 
does not constitute an official endorsement or approval of the use 
of such commercial products. 
The findings of this report are not to be construed as an 
official Department of the Army position, unless so desig- 
nated by other authorized documents. 
EB) ranren ON RECYCLED PAPER 
