http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Cosmic Disturbances of the earth's magnetic field and their influence upon radio communication
Kennelly, Arthur Edwin: Cosmic Disturbances of the earth's magnetic field and their influence upon radio communication. 1932 -- in: Field, The magnetic, of the earth and its atmosphere. -- BZD