Ludlum, Robert. <br/><br/>
The Sigma protocol / 
by Robert Ludlum. 
 - London, England :  Orion,  2001. 
 - 612 p. ;  17 cm. 
<br/><br/><label>ISBN: </label>0752848135 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Government investigators--Fiction.