Ernst DrIing. <br/><br/>
Dictionary of industrial technics 

 - New Delhi :  ,  1994 
 - 805. 
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential developmental psychology
<br/><br/><label>Dewey Class. No.: </label>155  / ERN