?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=M.E.R.&rft.au=Kats%2C+M.E.R.&rft.aulast=Kats&rft.degree=Bachelor&rft.date=2019&rft.title=Physical+Activity+of+Children+and+Adolescents%3A+The+relationship+between+socioeconomic+status+and+physical+activity+levels+of+children+and+adolescents