Longitudinal research
| Egile nagusia: | |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Newbury Park, Calif.
Sage
c1991.
|
| Saila: | Sage university papers series. Quantitative applications in the social sciences
no.07-076 |
| Gaiak: |