69. Gegenstand.
Das Weltsystem Theil 2, GDML_Books, (1896), p. 1 / Harvested from
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@article{PPN517627655+dmdlog6,
     title = {69. Gegenstand.},
     booktitle = {Das Weltsystem Theil 2},
     series = {GDML\_Books},
     year = {1896},
     pages = {1},
     url = {http://dml.mathdoc.fr/item/PPN517627655+dmdlog6}
}

 (éd.). 69. Gegenstand., dans Das Weltsystem Theil 2, GDML_Books,  (1896), p. 1. http://gdmltest.u-ga.fr/item/PPN517627655+dmdlog6/