B. Trigonometrie.
Aufgaben Band 1, GDML_Books, (1865), p. 22 / Harvested from
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@article{PPN592152413+DMDLOG_0006,
     title = {B. Trigonometrie.},
     booktitle = {Aufgaben Band 1},
     series = {GDML\_Books},
     publisher = {Koch},
     year = {1865},
     pages = {22},
     url = {http://dml.mathdoc.fr/item/PPN592152413+DMDLOG_0006}
}

 (éd.). B. Trigonometrie., dans Aufgaben Band 1, GDML_Books,  (1865), p. 22. http://gdmltest.u-ga.fr/item/PPN592152413+DMDLOG_0006/