Reiff, G <br/><br/>
Selecting a probability sample of school children in the coterminous United States.  [electronic resource] 

 -  Research quarterly  May 1968 
 - 409-14 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0034-5377 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Child<br/>Female<br/>Humans<br/>Male<br/>Methods<br/>Physical Fitness<br/>Probability<br/>Sampling Studies