A directory of geomagnetic observatories with high-resolution digital results, 1987 - Svendsen, Kendall Lorraine 1919-; McLean, S. J.; Flanagan, W. V. (Boulder, Colo. : World Data Center a for Solid Earth Geophysics U S Dept of Commerce, 1980)
Keywords: LABORATORIOS GEOMAGNETICOS -- DIRECTORIOS