Social diversity of physical activity of young people aged 11-16 years

JOPKIEWICZ, Andrzej - JOPKIEWICZ, Agata - NOWAK, Stanisław Bogdan. Social diversity of physical activity of young people aged 11-16 years. In Human's Health in Differrent Periods of Life. - Radom : Wydawnictwo Uniwersytetu Technologiczno-Humanistycznego, 2012. ISBN 978-83-7351-518-5, s. 106-114.