Massey, William V <br/><br/>
Observations of playground play during elementary school recess.  [electronic resource] 

 -  BMC research notes  Oct 2018 
 - 755 p.  digital 
<br/><br/> Publication Type: Journal Article; Observational Study 
<br/><br/><label>ISSN: </label>1756-0500 
<br/><br/><label>Standard No.: </label>10.1186/s13104-018-3861-0  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child<br/>Child Behavior<br/>Exercise<br/>Female<br/>Humans<br/>Male<br/>Motor Activity<br/>Play and Playthings<br/>Psychometrics--instrumentation<br/>Reproducibility of Results<br/>Schools--statistics & numerical data<br/>Sports--statistics & numerical data<br/>Urban Population