IV. Zum Briefwechsel GAUSS-SCHUMACHE R .
Varia. Atlas des Erdmagnetismus Bd. 12, GDML_Books, (1929), p. 256 / Harvested from
Access to full text 
@article{PPN236060120+dmdlog150,
     title = {IV. Zum Briefwechsel GAUSS-SCHUMACHE R .},
     booktitle = {Varia. Atlas des Erdmagnetismus Bd. 12},
     series = {GDML\_Books},
     year = {1929},
     pages = {256},
     url = {http://dml.mathdoc.fr/item/PPN236060120+dmdlog150}
}

 (éd.). IV. Zum Briefwechsel GAUSS-SCHUMACHE R ., dans Varia. Atlas des Erdmagnetismus Bd. 12, GDML_Books,  (1929), p. 256. http://gdmltest.u-ga.fr/item/PPN236060120+dmdlog150/