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3109770
3109770
http://dx.doi.org/10.2307/3109770
Between- and within-cluster covariate effects in the analysis of clustered data.
P356
Q32060871-31130B92-83A0-4EC2-83C4-1AAE0DAA53D7
P356
3109770
http://dx.doi.org/10.2307/3109770