Geological survey research 1973 : a summary of recent significant scientific and economic results accompanied by a list of geologic and hydrologic investigations in progress and a report on the status of topographic mapping /
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
U.S. Govt. Print. Off,
1973.
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| Series: | Geological Survey professional paper ;
850. |
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| Physical Description: | vii, 366 pages : illustrations ; 29 cm. |
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