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Questions before ordering? Use this form to request more information from Victoria Bookshop About NASA Technical Note Nasa TN D-6237. Derivation of the International Geomagnetic Reference Field. [IGRF 10/68].
Washington: NASA, 1971. First Edition. . Paperback. Very Good +. 4to. A very nice copy. Ex research station library stamp to front cover. Slight mark to rear cover. …