Browsing by Author Johnson, Robert Francis
Showing results 1 to 2 of 2
| Preview | Issue Date | Title | Author(s) |
|---|---|---|---|
 | 1955 | Geology and ore deposits of Atacocha district, departmento de Pasco, Peru | Johnson, Robert Francis; Lewis, Richard W.; Abele C., Guillermo |
 | 1955-05 | Geology of the Atacocha mine, department of Pasco, Peru | Johnson, Robert Francis |
