Selecting a probability sample of school children in the coterminous United States
Res Q
.
1968 May;39(2):409-14.
Authors
G Reiff
,
L Kish
,
J Harter
PMID:
5240126
No abstract available
MeSH terms
Adolescent*
Child*
Female
Humans
Male
Methods
Physical Fitness*
Probability
Sampling Studies*