School Mathematics Study Group, U.S.A. <br/><br/>
Mathematics for junior high school vol.1. Unit 14 

 - New Delhi  National council of education research and training  N/D 
 - 318-633 
<br/><br/><br/>English 
<br/><br/><label>Dewey Class. No.: </label>375.51  / S.M.S.G.