@article{PPN236020595+dmdlog328, title = {Aus HUMBOLDTS Kosmos 1850}, booktitle = {Nachtraege zur Physik, Chronologie und Astronomie Bd.11, Abt.1}, series = {GDML\_Books}, year = {1927}, pages = {448}, url = {http://dml.mathdoc.fr/item/PPN236020595+dmdlog328} }
(éd.). Aus HUMBOLDTS Kosmos 1850, dans Nachtraege zur Physik, Chronologie und Astronomie Bd.11, Abt.1, GDML_Books, (1927), p. 448. http://gdmltest.u-ga.fr/item/PPN236020595+dmdlog328/