TY  - BOOK
AU  - Litwin,Mark S.
TI  - How to measure survey reliability and validity
T2  - The survey kit
SN  - 0803957041
U1  - 300.723 20
PY  - 1995///
CY  - Thousand Oaks, London
PB  - Sage
KW  - Social surveys
N1  - Includes bibliographical references (p63-65)
ER  -