The world factbook / 
Central Intelligence Agency. 
 - Washington, D.C. : Central Intelligence Agency :   For sale by the Supt. of Docs., U.S. G.P.O.,   1991 
 - 405 p. :   ill, maps . ;  30cm.  
<br/><br/><label>Subjects--Corporate Names: </label><br/>United States. Central Intelligence Agency --Bibliography--Periodicals.<br/>United States. Central Intelligence Agency --Maps--Bibliography--Periodicals.<br/>United States. Central Intelligence Agency.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Intelligence service--History--United States--20th century--Sources.<br/>Intelligence service--History--United States--20th century--Sources.<br/>Political science. <br/>Political statistics<br/>United States. Central Intelligence Agency --History.<br/>World politics