83. Der Krystall.
Das Weltsystem Theil 2, GDML_Books, (1896), p. 73 / Harvested from
Access to full text 
@article{PPN517627655+dmdlog22,
     title = {83. Der Krystall.},
     booktitle = {Das Weltsystem Theil 2},
     series = {GDML\_Books},
     year = {1896},
     pages = {73},
     url = {http://dml.mathdoc.fr/item/PPN517627655+dmdlog22}
}

 (éd.). 83. Der Krystall., dans Das Weltsystem Theil 2, GDML_Books,  (1896), p. 73. http://gdmltest.u-ga.fr/item/PPN517627655+dmdlog22/