Reliefperspektive.
Geometrie Bd. 2, GDML_Books, (1968), p. 102 / Harvested from
@article{PPN37649882X+dmdlog56,
     title = {Reliefperspektive.},
     booktitle = {Geometrie Bd. 2},
     series = {GDML\_Books},
     year = {1968},
     pages = {102},
     url = {http://dml.mathdoc.fr/item/PPN37649882X+dmdlog56}
}
 (éd.). Reliefperspektive., dans Geometrie Bd. 2, GDML_Books,  (1968), p. 102. http://gdmltest.u-ga.fr/item/PPN37649882X+dmdlog56/