TY  - BOOK
AU  - Spurr,Josiah Edward
TI  - Political and commercial geology and the world's mineral resources
PY  - 1920///
CY  - New York
PB  - McGraw-Hill
KW  - GeologÃ­a econÃ³mica
KW  - GeologÃ­a polÃ­tica
KW  - Minerales
KW  - Recurso minero
KW  - Libro
ER  -