Kumari, Balusu Veena <br/><br/>
Operation blackboard 
Ms. Balusu Veena Kumari, Dr. Digumarti Bhaskara Rao 
 - New Delhi  A. P. H. Pub. Corp  2009 
 - xv, 123 p. ; 23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9788131304815 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Elementary Education
<br/><br/><label>Dewey Class. No.: </label>372.95484 BAL