Krummlinig begrenzte Flächenstücke.
Geometrie Bd. 2, GDML_Books, (1968), p. 10 / Harvested from
Access to full text 
@article{PPN37649882X+dmdlog12,
     title = {Krummlinig begrenzte Fl\"achenst\"ucke.},
     booktitle = {Geometrie Bd. 2},
     series = {GDML\_Books},
     year = {1968},
     pages = {10},
     url = {http://dml.mathdoc.fr/item/PPN37649882X+dmdlog12}
}

 (éd.). Krummlinig begrenzte Flächenstücke., dans Geometrie Bd. 2, GDML_Books,  (1968), p. 10. http://gdmltest.u-ga.fr/item/PPN37649882X+dmdlog12/