Técnicas mecanográficas modernas 
Josefina Q. de Gorbea ... [et al.] 
 - 3. ed.rev. 
 - México  McGraw-Hill  1979. 
 - xii, 133 p.  ill. 
<br/><br/><label>ISBN: </label>9686046143  14.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Typewriting<br/>Typewriting--Study and teaching.<br/>Business education