Barzun, Jacques ;  Graff, Henry F. <br/><br/>
The Modern Researcher 

 - 1st ed. 
 - New York :  Harcourt Brace and World,  1970 
 - 430 p. 
<br/><br/><label>ISBN: </label>0-15-562510-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HISTORIA
<br/><br/><label>Dewey Class. No.: </label>907  / B296m