TY  - BOOK
AU  - Burchard,Ernest F.
TI  - The production of fluorspar in 1913 with a note on cryolite
T2  - Mineral Resources of the United States, calendar year 1913-Part II
U1  - 549.4 
PY  - 1914///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
KW  - FLUORITA
KW  - CRIOLITA
KW  - PRODUCCION DE FLUORITA
N1  - Impreso
N2  - La producción de fluorita en 1913 con una nota en la criolita
ER  -