Barth, Tom F. W. <br/><br/>
Feldspars 

 - New York  Wiley interscience  1969 
<br/><br/><label>Subjects--Index Terms: </label>Silicates  Mineralogy  gems  Physical properties of feldspars  Tectosilicates  
<br/><br/><label>Dewey Class. No.: </label>549.68  / K9