@article{PPN236060120+dmdlog105, title = {CARL KELLNER an GAUSS, 13. Mai 1850}, booktitle = {Varia. Atlas des Erdmagnetismus Bd. 12}, series = {GDML\_Books}, year = {1929}, pages = {150}, url = {http://dml.mathdoc.fr/item/PPN236060120+dmdlog105} }
(éd.). CARL KELLNER an GAUSS, 13. Mai 1850, dans Varia. Atlas des Erdmagnetismus Bd. 12, GDML_Books, (1929), p. 150. http://gdmltest.u-ga.fr/item/PPN236060120+dmdlog105/