TY  - BOOK
AU  - Vallance, Reece H, et al.
TI  - Textbook of inorganic chemistry, Vol.7, Part2: Sulphur, selenium, and tellurium
U1  - PG 546  VAL-T.7.2 
PB  - Charles Griffin & Company Ltd., London
KW  - Inorganic chemistry
ER  -