Heredia Ancona, Bertha. <br/><br/>
Manual para la elaboración de material didáctico 
Bertha Heredia Ancona. 
 - 1a ed. 
 - México  Núcleo Editorial  1987. 
 - 176 p.  ill.  23 cm. 
<br/><br/> Index. 
<br/><br/>Bibliography: p. 171. 
<br/><br/><label>ISBN: </label>9682414644 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching--Aids and devices.<br/>Education, Higher<br/>Individualized instruction<br/>Open plan schools