Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:9ba7a664-ec44-42c8-81bd-e890a46d1702 |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:9ba7a664-ec44-42c8-81bd-e890a46d1702 |