Principles of visual programming systems 
edited by Shi-Kuo Chang 
 - New Jersey  Prentice Hall  1990 
 - 372p. 
<br/><br/><label>ISBN: </label>013710765X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Visual programming (Computer science)
<br/><br/><label>Dewey Class. No.: </label>I5372 F362