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| Title | Potentiometric surface of the Aquia aquifer in southern Maryland during the fall of 1987 / |
| Format | online resource |
| Internet Access | https://purl.fdlp.gov/GPO/gpo142203 |
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| Published | Towson, Maryland : Department of the Interior, U.S. Geological Survey, 1989. |
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| Cartographic Data | Scale approximately 1:640,000 (W 77°00ʹ--W 76°00ʹ/N 39°10ʹ--N 38°00ʹ). |
| Description | 1 online resource (1 map). |
| Content Type | cartographic image |
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| General Note | Relief shown by contours and spot heights. |
| "Prepared in cooperation with Maryland Geological Survey and Maryland Power Plant Research Program." | |
| Metadata Source | Description based on online resource; title from PDF title page (USGS, viewed July 29, 2020). |
| Subject - LC |
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| URL | Address at time of PURL creation http://pubs.er.usgs.gov/publication/wri894012 |
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| Holdings | All items |
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| OCLC Number | (OCoLC)966435464 |
| CGP Record Link | https://catalog.gpo.gov:443/F/?func=direct&doc_number=001126151&local_base=GPO01PUB |
| System Number | 001126151 |