TY  - BOOK
AU  - Smith,Philip S.
TI  - Sulphur and pyrites in 1919
T2  - Mineral Resources of the United States, 1919-Part II
U1  - 553 
PY  - 1922///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
KW  - AZUFRE
KW  - PIRITA
N1  - Impreso
ER  -