Magnetic Observatory (Cheltenham, Md.) Bezüge im Wissensnetz Verfasst (3) DNB-Titeldaten Magnetic Observatory results at Cheltenham, Maryland Magnetograms and hourly values Results of observations made at the United States Coast and Geodetic Survey Magnetic Observatory at Cheltenham, Maryland Creator (3) DNB-Titeldaten Magnetic Observatory results at Cheltenham, Maryland Magnetograms and hourly values Results of observations made at the United States Coast and Geodetic Survey Magnetic Observatory at Cheltenham, Maryland Isb (3) DNB-Titeldaten Magnetic hourly values, Cheltenham, Maryland Magnetograms, Cheltenham, Maryland Preliminary monthly and annual mean values of the magnetic elements from ... to ... Administrative Überordnung der Körperschaft (1) GND-Körperschaften Coast and Geodetic Survey Sitz (1) GND-Körperschaften Cheltenham, Md.