Intelligence Requirements For the 1980's:  Covert Action / 
Roy Godson. 
 - Washington :  National Strategy Information Center, Inc.,  1981. 
 - 243 
 - 321/323 .
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<br/><br/><label>ISBN: </label>0-87855-830-6 
<br/><br/><label>Dewey Class. No.: </label>321/323