Cap. XI. Die perspectivische Projection.
Geometrie des Raumes Theil 2, GDML_Books, (1874), p. 257 / Harvested from
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@article{PPN587689498+DMDLOG_0020,
     title = {Cap. XI. Die perspectivische Projection.},
     booktitle = {Geometrie des Raumes Theil 2},
     series = {GDML\_Books},
     publisher = {Teubner},
     address = {Leipzig},
     year = {1874},
     pages = {257},
     url = {http://dml.mathdoc.fr/item/PPN587689498+DMDLOG_0020}
}

 (éd.). Cap. XI. Die perspectivische Projection., dans Geometrie des Raumes Theil 2, GDML_Books,  (1874), p. 257. http://gdmltest.u-ga.fr/item/PPN587689498+DMDLOG_0020/