TY  - BOOK
AU  - Hess,Frank L.
TI  - Cobalt, Molybdenum, Tantalum, Titanium, Radium, uranium and vanadium in 1918
PY  - 1920///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
N1  - Impreso
ER  -