Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:a802ce7e-515e-4b1a-a8ca-20c21ca48f7d |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:a802ce7e-515e-4b1a-a8ca-20c21ca48f7d |