Conrad, Joseph..
Heard of Darkness: Revised an authoritative text backgrounds and sources criticism /
Edited by Robert Kimbrough 
. - New York : W.W. Norton and Company,  1971 
. - XII, 270 p.  21 cm. 
<br/>К.: Бібліогр. 
<br/><label>  ISBN: </label>0-393-04347-9