@misc{WM_1907_11_1-2-3_a5,
     title = {Kr\'otki rys dziej\'ow {Obserwatoryum} {Warszawskiego} 1820-1900},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {81--103},
     publisher = {mathdoc},
     volume = {11},
     number = {1-2-3},
     year = {1907},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1907_11_1-2-3_a5/}
}