Media type: E-Article Title: A comment on trajectory calculations in the Williams and mead geomagnetic field model Contributor: Morfill, G.E. Published: Elsevier BV, 1971 Published in: Planetary and Space Science, 19 (1971) 8, Seite 1016-1018 Language: English DOI: 10.1016/0032-0633(71)90154-1 ISSN: 0032-0633 Keywords: Space and Planetary Science ; Astronomy and Astrophysics Origination: Footnote: