TY  - BOOK
AU  - Spector, Paul E.,
TI  - Research designs
T2  - A Sage university papers series. Quantitative applications in the social sciences
SN  - 0803917090
AV  - H62 S72
PY  - 1981///
CY  - Beverly hills, california
PB  - Sage
KW  - Ciencias sociales
KW  - Investigación
ER  -