Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:c0876b32-dbc4-48ad-98e9-ef1f785e3159 |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:c0876b32-dbc4-48ad-98e9-ef1f785e3159 |