Perry und seine Tendenzen.
Geometrie Bd. 2, GDML_Books, (1968), p. 233 / Harvested from
Access to full text 
@article{PPN37649882X+dmdlog126,
     title = {Perry und seine Tendenzen.},
     booktitle = {Geometrie Bd. 2},
     series = {GDML\_Books},
     year = {1968},
     pages = {233},
     url = {http://dml.mathdoc.fr/item/PPN37649882X+dmdlog126}
}

 (éd.). Perry und seine Tendenzen., dans Geometrie Bd. 2, GDML_Books,  (1968), p. 233. http://gdmltest.u-ga.fr/item/PPN37649882X+dmdlog126/