@article{PPN236060120+dmdlog255, title = {Bemerkungen}, booktitle = {Varia. Atlas des Erdmagnetismus Bd. 12}, series = {GDML\_Books}, year = {1929}, pages = {406}, url = {http://dml.mathdoc.fr/item/PPN236060120+dmdlog255} }
(éd.). Bemerkungen, dans Varia. Atlas des Erdmagnetismus Bd. 12, GDML_Books, (1929), p. 406. http://gdmltest.u-ga.fr/item/PPN236060120+dmdlog255/