Martin, Judy <br/><br/>
Encyclopedia of coloured pencil techniques / 
Judy Martin 
 - London :  Quarto Publishing,  n.d 
 - 191 p :  ill 
<br/><br/><label>ISBN: </label>9810083424 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Penil drawing--Techniques
<br/><br/><label>LC Class. No.: </label>Ref NC892  / M379 E5