@misc{Euler_Leonhard_(1707-1783)_Dioptricae., author={Euler, Leonhard (1707-1783)}, howpublished={online}, publisher={impensis Academiae Imperialis Scientiarum}, language={lat}, type={stary druk}, title={Dioptricae. Ps. 2, Continens librvm secvndvm, de constrvctione telescopiorvm dioptricorvm cvm appendice de constrvctione telescopiorvm catoptrico-dioptricorvm}, keywords={optyka, teleskopy, mikroskopy, starodruki}, }