Pen control and tracing  : an introduction to pen control and tracing with practical exercises to do many times over 

 - New York :  St. Martin's press,  c 2017. 
 - col., ill.  ; 28 cm. 
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<br/><br/><label>ISBN: </label>9780312521837 
<br/><br/><label>Dewey Class. No.: </label>T 421 P397 2017