Burchard, Ernest F.
Fluorspar and cryolite in 1916. - Washington, D.C. Government Printing Office 1917 - pp. 309-325 - Mineral Resources of the United States, 1916-Part II .
Impreso
Ingles
MINERIA
FLUOR
CRIOLITA
ESPATO
549.4
Fluorspar and cryolite in 1916. - Washington, D.C. Government Printing Office 1917 - pp. 309-325 - Mineral Resources of the United States, 1916-Part II .
Impreso
Ingles
MINERIA
FLUOR
CRIOLITA
ESPATO
549.4