Cap. II. Der körperliche Winkel.
Geometrie des Raumes Theil 2, GDML_Books, (1874), p. 21 / Harvested from
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@article{PPN587689498+DMDLOG_0006,
     title = {Cap. II. Der k\"orperliche Winkel.},
     booktitle = {Geometrie des Raumes Theil 2},
     series = {GDML\_Books},
     publisher = {Teubner},
     address = {Leipzig},
     year = {1874},
     pages = {21},
     url = {http://dml.mathdoc.fr/item/PPN587689498+DMDLOG_0006}
}

 (éd.). Cap. II. Der körperliche Winkel., dans Geometrie des Raumes Theil 2, GDML_Books,  (1874), p. 21. http://gdmltest.u-ga.fr/item/PPN587689498+DMDLOG_0006/