Vallance, Reece H, et al. <br/><br/>
Textbook of inorganic chemistry, Vol.7, Part2: Sulphur, selenium, and tellurium 

 -  Charles Griffin & Company Ltd., London  1931 
 - 420 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inorganic chemistry
<br/><br/><label>Dewey Class. No.: </label>PG 546  VAL-T.7.2