@book{PPN590572806, title = {Astronomische Wissenschaften Theil 2, Abtheilung 2}, series = {GDML\_Books}, publisher = {M\"uller}, year = {1797}, language = {de}, url = {http://dml.mathdoc.fr/item/PPN590572806} }
Lorenz, Johann Friedrich. Astronomische Wissenschaften Theil 2, Abtheilung 2. GDML_Books (1797), http://gdmltest.u-ga.fr/item/PPN590572806/