B. Trigonometrie.
Geometrie und Trigonometrie Abth. 2, GDML_Books, (1851), p. 46 / Harvested from
@article{PPN58470691X+DMDLOG_0004,
     title = {B. Trigonometrie.},
     booktitle = {Geometrie und Trigonometrie Abth. 2},
     series = {GDML\_Books},
     publisher = {Lampart},
     address = {Augsburg},
     year = {1851},
     pages = {46},
     url = {http://dml.mathdoc.fr/item/PPN58470691X+DMDLOG_0004}
}
 (éd.). B. Trigonometrie., dans Geometrie und Trigonometrie Abth. 2, GDML_Books,  (1851), p. 46. http://gdmltest.u-ga.fr/item/PPN58470691X+DMDLOG_0004/