A report on geomagnetic observatories and observations, 1994 [electronic resource] / by S.J. McLean [and three others] ; in cooperation with IAGA/IUGG, Division V, Magnetic Observatories, Instruments, Surveys, and Analysis.
Publication Info.
Boulder, Colorado : United States Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center, 1994.
