Mayaud, P N <br/><br/>
Hundred year series of geomagnetic data, 1868-1967 

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 - IUGG Publications, Holland  1973 
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<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetism; Physics
<br/><br/><label>Dewey Class. No.: </label>538  MAY-H