Nawaratna, A.A. <br/><br/>
Construction and Validation of an Ability Scale Suitable for the Age Group 12-13 Years in Sri Lanka 

 - Colombo  1991 
 - 228p. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability Scale<br/>Education Sociology<br/>M.Phil