III. Zweite Methode
Theoretische Astronomie Bd. 7, GDML_Books, (1906), p. 401 / Harvested from
Access to full text 
@article{PPN236008730+dmdlog74,
     title = {III. Zweite Methode},
     booktitle = {Theoretische Astronomie Bd. 7},
     series = {GDML\_Books},
     year = {1906},
     pages = {401},
     url = {http://dml.mathdoc.fr/item/PPN236008730+dmdlog74}
}

 (éd.). III. Zweite Methode, dans Theoretische Astronomie Bd. 7, GDML_Books,  (1906), p. 401. http://gdmltest.u-ga.fr/item/PPN236008730+dmdlog74/