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References
1.
Campbell
D.T.
Stanley
J.
Experimental and Quasiexperimental Designs for Research
1963
Rand McNally
Chicago
2.
Friedmen
D.
Pisani
R.
Purves
R.
Statistics
1978
Holt, Rinehart and Winston
New York
3.
Lord
F.M.
Novick
M.R.
Statistical Theories of Mental Test Scores
1968
Addison-Wesley
Reading, MA
