Keyword: era/period

Zeitalter

era/period

era/period is used as descriptor

 
Identifier Title Date Level of description Other information
EBA 2/283 Bericht über die geologischen Verhältnisse im Versuchsstollen Trübbach. Basel, den 15. Juli 1931 1931 File: 1 file Standard period of protection
EBA 2/285 Erzhorizont 1953 File: 1 file Standard period of protection
EBA 2/286 Erzhorizontes 1953 File: 1 file Standard period of protection
EBA 2/287 Studienreise Schweden und Norwegen 1953 File: 1 file Standard period of protection
GFA 9/3.83 GF intern, Nr. 83, April 1998 1998 File: 1 file digitized | prolonged period of protection
GFA 9/3.83.1 GF intern, Nr. 83, April 1998 1998 File: 1 file digital born digitized | public
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