Magnetic variation in the United States being a compilation of observations made in America from the year 1640 to the present date;

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Main Author: Stone, Jacob Bennett.
Format: Book Electronic
Published:New York [Smith & Vanden Houten, Printers] 1878.
Online Access:HathiTrust Digital Library 
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HathiTrust eResources (public domain)

Location: HathiTrust eResources (public domain)

Call Number: Online
Copy 1
Online Access:HathiTrust Digital Library