TY  - BOOK
AU  - Litwin,Mark S.
TI  - The Survey kit 7 How to measure survey reliability and validity
SN  - 0803957041 Vol-7
U1  - 300.723 22
PY  - 1995///
CY  - Thousand Oaks, Calif.
PB  - Sage Publications
KW  - Data Collection
KW  - Reproducibility of Resultssosiale
ER  -