Cho, Youngseon. <br/><br/>
Why?Books and printing press (Korean) : Why?책과 인쇄술 / 
Youngseon Cho ; illustrated by Hoeseok Song. 
 - Seoul, Korea :  Yearimdang,  2012. 
 - 184 P. 
<br/><br/><label>ISBN: </label>9788930231350 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Korean language materials.