Campbell, W. H. (1989). Quiet daily geomagnetic feilds. Birkhauser Verlag.
Chicago Edition CitationCampbell, Wallace H. Quiet Daily Geomagnetic Feilds. Basel: Birkhauser Verlag, 1989.
MLA Edition CitationCampbell, Wallace H. Quiet Daily Geomagnetic Feilds. Birkhauser Verlag, 1989.
Warning: These citations may not always be 100% accurate.