TY - JOUR A1 - Höpfner, Joachim T1 - Polar motion at seasonal frequencies Y1 - 1996 JF - Scientific Technical Report / Geoforschungszentrum Potsdam DO - 10.23689/fidgeo-544 PB - GFZ CY - Helmholtz-Zentrum UR - http://hdl.handle.net/11858/00-1735-0000-0001-32B0-C ER -