"Vaidya, Shobha" <br/><br/>
"Effect of mastery learning and concept attainment, self concept and attitude" 

 - New Delhi  Classical Publishing  1997 
 - 203 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education India
<br/><br/><label>Dewey Class. No.: </label>379.54 VAI