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![Antique Map "U.S. Coast Survey Lines of Equal Magnetic Declination for....1850" | eBay](https://i.ebayimg.com/images/g/MGIAAOSweVFjZDZj/s-l1600.jpg "Antique Map "U.S. Coast Survey Lines of Equal Magnetic Declination for....1850" | eBay")
Antique Map "U.S. Coast Survey Lines of Equal Magnetic Declination for....1850" | eBay
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Magnetic Declination - Land Surveyors Dictionary - Land Surveyors United - Global Surveying Community
