Verma Ajit ram <br/><br/>
Polymorphism and polytypism in crystals 

 - New York  John Wiley USA       1966 
 - 341P.  cm. 
<br/><br/><label>Standard No.: </label>103450 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>C216, K6