Dat, Poly <br/><br/>
Encyclopaedia of teaching of science volume - 1 (A-L) 

 - First 
 - New Delhi  Sarup & Sons  2000 
 - 343  Hb 
<br/><br/><label>ISBN: </label>81-7625-090-2 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>R375.503