%0 Journal Article
%T The Playground as a Factor in School Hygiene
%J Psychol Clin
%D 1909
%A Johnson, George E.
%V 3
%N 1
%P 14-20
%X <p>[Abstract unavailable]</p><p>Language: en</p>
%G en
%I 
%@ 
%U http://dx.doi.org/