Tamil Nadu Textbook and Educational Services Corporation <br/><br/>
Mathematics-7th Std/ 
Tamil Nadu Textbook and Educational Services Corporation 
 - Chennai:  Tamil Nadu Textbook and Educational Services Corporation, 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>510  / TAM