Research designs
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Beverly Hills
Sage Publications
c1981.
|
| Schriftenreihe: | Sage university papers series. Quantitative applications in the social sciences
no. 07-023. |
| Schlagworte: |