Singha, H S <br/><br/>
Preparation production and evaluation of text books / 
by H S Singha 
 - New Delhi :  National council of educational research and training,  1973. 
 - 121p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Maths
<br/><br/><label>Dewey Class. No.: </label>510  / NCE.P