edited by Devendra Thakur and D N Thakur <br/><br/>
Vocational and technical education 

 - Deep & Deep, New Delhi  1997 
 - x,615p figs.,tabs. 
<br/><br/><label>ISBN: </label>81-7100-866-6 
<br/><br/><label>Dewey Class. No.: </label>371.426 Tha/Tha