Search Results for the EPA National Library Catalog

Items Found: 3

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Your Search: (SUBJECT=Observatories)


Select Item Title Year Published
Derivation of the International Geomagnetic Reference Field, Igrf/10/68/. 1971
Geophysical Observations Monthly Bulletin, Jul. 1970. 1970
Greenwich Time Report Quarterly Report, Jul. - Sep. 1970. 1970

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