Exkurs über Legendres Parallelentheorie.
Geometrie Bd. 2, GDML_Books, (1968), p. 240 / Harvested from
Access to full text 
@article{PPN37649882X+dmdlog131,
     title = {Exkurs \"uber Legendres Parallelentheorie.},
     booktitle = {Geometrie Bd. 2},
     series = {GDML\_Books},
     year = {1968},
     pages = {240},
     url = {http://dml.mathdoc.fr/item/PPN37649882X+dmdlog131}
}

 (ed.). Exkurs über Legendres Parallelentheorie., in Geometrie Bd. 2, GDML_Books,  (1968), p. 240. http://gdmltest.u-ga.fr/item/PPN37649882X+dmdlog131/