§ 2. Moduln (Freie Gruppen).
Topologie Bd. 1, GDML_Books, (1935), p. 562 / Harvested from
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@article{PPN379157292+dmdlog94,
     title = {\S\ 2. Moduln (Freie Gruppen).},
     booktitle = {Topologie Bd. 1},
     series = {GDML\_Books},
     year = {1935},
     pages = {562},
     url = {http://dml.mathdoc.fr/item/PPN379157292+dmdlog94}
}

 (éd.). § 2. Moduln (Freie Gruppen)., dans Topologie Bd. 1, GDML_Books,  (1935), p. 562. http://gdmltest.u-ga.fr/item/PPN379157292+dmdlog94/