Joseph, Mary. <br/><br/>
Thomas Alva Edison / 
Mary Joseph. 
 - New Delhi :  Learners Press,  1993. 
 - 48  p. 
<br/><br/><label>ISBN: </label>8171810845 :  KES 125 
<br/><br/><label>Subjects--Personal Names: </label><br/>Edison, Thomas Alva.