Barron, John,  1930-2005. <br/><br/>
Breaking the ring / 
John Barron. 
 - Boston :  Houghton Mifflin,  1987. 
 - 244 p., [8] p. of plates :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 225-236. 
<br/><br/><label>ISBN: </label>0395421101 
<br/><br/><label>LCCN: </label>86033803  
<br/><br/><label>Subjects--Personal Names: </label><br/>Walker, John A., Jr.  1937-2014. <br/>Walker family.<br/>Whitworth, Jerry, 1939- 
<br/><br/><label>Subjects--Corporate Names: </label><br/>United States. Federal Bureau of Investigation. <br/>United States. Navy --Communication systems.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Espionage, Soviet--History.--United States
<br/><br/><label>Subjects--Index Terms: </label>აშშ  შპიონაჟი  ისტორია  ფედერალური ბიურო  ვოლკერის ოჯახი 
<br/><br/><label>LC Class. No.: </label>UB271.R92  / W342 1987 
<br/><br/><label>Dewey Class. No.: </label>327.1/2/0924