TY  - BOOK
AU  - Katz,Frank J.
TI  - Feldspar in 1916
T2  - Mineral Resources of the United States, 1916-Part II
U1  - 549.68 
PY  - 1917///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
KW  - FELDESPATO
N1  - Impreso
ER  -