Bányászat: Szénbányászat: Nógrádi Szénbányák
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:904db159-4b0d-413a-8918-f4f62755a58b |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:904db159-4b0d-413a-8918-f4f62755a58b |