@article{10_14708_wm_v3i2_2625,
     author = {J. {\L}ukaszewicz},
     title = {Julian {Perkal,} {Matematyka} dla rolnik\'ow, cz\k{e}\'s\'c {I}},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 192--193},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1959},
     doi = {10.14708/wm.v3i2.2625},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v3i2.2625/}
}