@article{PMF_1935_42_1_a7,
     author = {Rybka, E.},
     title = {Provisional photovisual magnitudes of 260 stars near {North} {Pole}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {133--170},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {1935},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PMF_1935_42_1_a7/}
}