TY  - BOOK
AU  - DeVellis,Robert F.
TI  - Scale development: theory and applications 
SN  - 080393775X
PY  - 1991///
CY  - Newbury Park, Calif.
PB  - Sage
KW  - Scaling (Social sciences)
N1  - Includes bibliographical references (p. 115-118) and index
ER  -