GAUSS an SCHUHMACHER 1811 Januar 6
Theoretische Astronomie Bd. 7, GDML_Books, (1906), p. 419 / Harvested from
Access to full text 
@article{PPN236008730+dmdlog89,
     title = {GAUSS an SCHUHMACHER 1811 Januar 6},
     booktitle = {Theoretische Astronomie Bd. 7},
     series = {GDML\_Books},
     year = {1906},
     pages = {419},
     url = {http://dml.mathdoc.fr/item/PPN236008730+dmdlog89}
}

 (éd.). GAUSS an SCHUHMACHER 1811 Januar 6, dans Theoretische Astronomie Bd. 7, GDML_Books,  (1906), p. 419. http://gdmltest.u-ga.fr/item/PPN236008730+dmdlog89/