§ 61. Das Symbol (a/w)
Gesammelte Abhandlungen Bd. 1, GDML_Books, (1932), p. 160 / Harvested from
Access to full text 
@article{PPN237821559+dmdlog104,
     title = {\S\ 61. Das Symbol (a/w)},
     booktitle = {Gesammelte Abhandlungen Bd. 1},
     series = {GDML\_Books},
     year = {1932},
     pages = {160},
     url = {http://dml.mathdoc.fr/item/PPN237821559+dmdlog104}
}

 (éd.). § 61. Das Symbol (a/w), dans Gesammelte Abhandlungen Bd. 1, GDML_Books,  (1932), p. 160. http://gdmltest.u-ga.fr/item/PPN237821559+dmdlog104/