Line and shading in drawing / 
[text, Gabriel Martin Roig ; exercises, Barta Bru ... [et al.] ; photography, Nos & Soto ; English translation by Marcela Estibill] 
 - Hauppauge, NY :  Barron's Educational Series,  2005 
 - 95 p. :  ill. (some. col.) ;  27 cm. 
 - Drawing academy .
<br/><br/><label>ISBN: </label>0764158635 9780764158636 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shades and shadows in art<br/>Drawing--Technique