Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:24f518d4-2468-4430-a957-91d01ca5b97e |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:24f518d4-2468-4430-a957-91d01ca5b97e |