Elementa astronomiæ. Præfatio.
Qui Opticam, Perspectivam, Catoptricam, Dioptricam, Sphaerica et Trigonometriam Sphaericam, atque Astronomiam, tam Sphaericam quam Theoricam, complectitur Tomus 3, GDML_Books, (1740), p. 341 / Harvested from
Access to full text 
@article{PPN588775274+DMDLOG_0020,
     title = {Elementa astronomi\ae . Pr\ae fatio.},
     booktitle = {Qui Opticam, Perspectivam, Catoptricam, Dioptricam, Sphaerica et Trigonometriam Sphaericam, atque Astronomiam, tam Sphaericam quam Theoricam, complectitur Tomus 3},
     series = {GDML\_Books},
     publisher = {Gosse},
     address = {Genevae},
     year = {1740},
     pages = {341},
     url = {http://dml.mathdoc.fr/item/PPN588775274+DMDLOG_0020}
}

 (éd.). Elementa astronomiæ. Præfatio., dans Qui Opticam, Perspectivam, Catoptricam, Dioptricam, Sphaerica et Trigonometriam Sphaericam, atque Astronomiam, tam Sphaericam quam Theoricam, complectitur Tomus 3, GDML_Books,  (1740), p. 341. http://gdmltest.u-ga.fr/item/PPN588775274+DMDLOG_0020/