Wilmerding, John, text. <br/><br/>
Andrew Wyeth. The Helga Pictures 

 - New York :  H.N. Abrams,  1987 
 - 208 p.  il. col.  
<br/><br/> A national treasure/Leonard E. B. Andrews -- Andrew Wyeth's Helga Suite/John Wilmerding -- The Helga Pictures/Andrew Wyeth 
<br/><br/><label>ISBN: </label>0810917882  
<br/><br/><label>Subjects--Topical Terms: </label><br/>REALISMO<br/>RETRATOS<br/>BOCETOS<br/>PINTORES NORTEAMERICANOS