@article{PPN236060120+dmdlog190, title = {GAUSS an SCHUMACHER, 8. Sept. 1844}, booktitle = {Varia. Atlas des Erdmagnetismus Bd. 12}, series = {GDML\_Books}, year = {1929}, pages = {298}, url = {http://dml.mathdoc.fr/item/PPN236060120+dmdlog190} }
(éd.). GAUSS an SCHUMACHER, 8. Sept. 1844, dans Varia. Atlas des Erdmagnetismus Bd. 12, GDML_Books, (1929), p. 298. http://gdmltest.u-ga.fr/item/PPN236060120+dmdlog190/