91. Der Erdmagnetismus.
Das Weltsystem Theil 2, GDML_Books, (1896), p. 126 / Harvested from
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@article{PPN517627655+dmdlog30,
     title = {91. Der Erdmagnetismus.},
     booktitle = {Das Weltsystem Theil 2},
     series = {GDML\_Books},
     year = {1896},
     pages = {126},
     url = {http://dml.mathdoc.fr/item/PPN517627655+dmdlog30}
}

 (éd.). 91. Der Erdmagnetismus., dans Das Weltsystem Theil 2, GDML_Books,  (1896), p. 126. http://gdmltest.u-ga.fr/item/PPN517627655+dmdlog30/