Sampling opinions
Stephan, Frederick F.
Sampling opinions an analysis of survey procedure - New York
John Wiley & Sons 1958 - XXI, 451
Mathematice
sampling opinions
519.907 / STE
Sampling opinions an analysis of survey procedure - New York
John Wiley & Sons 1958 - XXI, 451
Mathematice
sampling opinions
519.907 / STE