The geologic time classification of the United States Geological Survey compared with other classifications accompanied by the original definitions of era, period and epoch terms /
| Main Author: | |
|---|---|
| Corporate Author: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1925.
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| Series: | U.S. Geological Survey bulletin ;
769. |
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