@Article{539197,
     author = "Milan Duris, Margareta Sojkova",
     title = "Level practical skills of 7th grade pupils while working with technical material – metal",
     year =  2016,
     volume =  ,
     number =  4(18),
     journal =  Edukacja - Technika - Informatyka,
     pages =  s. 117-128,
    }