Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:58a231d8-9895-4c61-9aad-d8b7d86d08c5 |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:58a231d8-9895-4c61-9aad-d8b7d86d08c5 |