Allen, Thomas <br/><br/>
Intelligence in the American Civil War 

 -  Nova Science Publishers, Inc.  2010 
 - Intelligence and Counterintelligence Studies Series .
<br/><br/><label>ISBN: </label>9781606922095 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Civil War Period (1850-1877)<br/> United States <br/>HISTORY <br/>Intelligence service--Confederate States of America--History--19th century.,Intelligence service--United States--History--19th century.,Military intelligence--Confederate States of America--History--19th century.,Military intelligence--United States--History--19th century.