Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:4ac39152-eae0-4899-a5e5-54f77d516049 |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:4ac39152-eae0-4899-a5e5-54f77d516049 |