Bányászat: Szénbányászat: Általában
Institution: | Open Society Archives at Central European University |
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Subjects: | |
Online Access: | http://hdl.handle.net/10891/osa:74a8ca7c-08db-477d-aa0f-e44599debed1 |
Institution: | Open Society Archives at Central European University |
---|---|
Subjects: | |
Online Access: | http://hdl.handle.net/10891/osa:74a8ca7c-08db-477d-aa0f-e44599debed1 |