来源:Contributions to Geophysics and Geodesy , 2013
作者:Fridrich Valach
关键词:geomagnetic observatory;historical data;...
使用许可:CC BY-NC-ND
来源:Contributions to Geophysics and Geodesy , 2013
作者:Fridrich Valach
关键词:geomagnetic observatory;historical data;...
使用许可:CC BY-NC-ND