Graphonomics :  contemporary research in handwriting / 
edited by Henry S. R. Kao, Gerard P. Van Galen, Rumjahn Hoosain. 
 - Amsterdam ;  New York :  North-Holland,   1986. 
<br/><br/><label>ISBN: </label>0444700471 
<br/><br/><label>Universal Decimal Class. No.: </label>159.9