PE :  The Magazine for Professional Engineers. 

 - monthly 
 - Alexandria, VA :  National Society of Professional Engineers,  c2006. 
 -  28cm. 
 -  Vol. 28, No.7 (August/September 2006) .
<br/><br/><label>ISSN: </label>0195-6876 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering -- Periodicals