Szénbányászat: Általános
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:46900988-773b-4c7b-b81e-c501fd345bb7 |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:46900988-773b-4c7b-b81e-c501fd345bb7 |