@Article{510249,
     author = "Olga Mironiuk-Gracz, Karolina Byczewska-Konieczny",
     title = "Report of the 17th European Conference on Developmental Psychology",
     year =  2015,
     volume =  ,
     number =  2(8),
     journal =  Journal of Preschool and Elementary School Education,
     pages =  s. 113-119,
    }