Campbell, W. H. (1989). Quiet daily geomagnetic feilds. Birkhauser Verlag.
Chicago Edition CitationCampbell, Wallace H. Quiet Daily Geomagnetic Feilds. Basel: Birkhauser Verlag, 1989.
MLA citiranjeCampbell, Wallace H. Quiet Daily Geomagnetic Feilds. Birkhauser Verlag, 1989.
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