Czaja, Ronald.
Designing surveys : a guide to decisions and procedures / Ronald Czaja, Johnny Blair. - Pine Forge Press 1996.
6210
Surveys.
Sampling (Statistics).
HA31.2 / Cza.
Designing surveys : a guide to decisions and procedures / Ronald Czaja, Johnny Blair. - Pine Forge Press 1996.
6210
Surveys.
Sampling (Statistics).
HA31.2 / Cza.