Encyclopaedia of Physical Science and Technology :   Volume 5 ( Elem-Gam) 
/ by Academic press 
 - London:  Academic press,  1987. 
 - 793p. 
<br/><br/><label>ISBN: </label>0122269055 
<br/><br/><label>Dewey Class. No.: </label>503.21  / ENC/E