Nolen Barbara <br/><br/>
Writers' hand book for the development of educational materials 
U. S. Department of Health, Education, and Welfare 
 - Washington, USA  U.S. Government Printing Office   1959 
 - x,183p. 
<br/><br/><br/>Bulletin 1959, No. 19 
<br/><br/><label>Source: </label>Textual