Yearbook, magnetic results.
Adolf-Schmidt-Observatorium für Geomagnetismus in Niemegk,issuing body.
Erdmagnetisches Observatorium (Wingst, Germany),issuing body.
Potsdam : Adolf Schmidt Geomagnetic Observatory Niemegk,
2001-
Adolf-Schmidt-Observatorium für Geomagnetismus in Niemegk
Geomagnetism
Jahrbuch ... des Adolf-Schmidt-Observatoriums für Geomagnetismus in Niemegk
Geomagnetic results Wingst