TY  - BOOK
AU  - McCaskey,H.D.
TI  - Mineral resourses of the United States 1915. Part II-Nonmetals
U1  - 549 
PY  - 1917///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
KW  - NO METALES
KW  - RECURSOS MINERALES
N1  - Impreso
ER  -