Glinert, Ephraim, P. <br/><br/>
Visual programming environments: Paradigms and systems 

 - California  IEEE Computer society Press  1990 
 - 661p.  26 cm. 
<br/><br/><label>ISBN: </label>0818689730 
<br/><br/><label>Dewey Class. No.: </label>006.37,  / D, vis