TY - BOOK AU - Robert F. Devellis TI - Scale development:theory and applications SN - 0-8039-3775-X U1 - 300.72 PY - 1991/// CY - London PB - Sage Publications N1 - Robert F. Devellis: Scale development:theory and applications. London. Sage Publications, 1991. 0-8039-3775-X--(300.72DEV) ER -