Showing 1 - 2 results of 2 for search 'Robert F DeVellis', query time: 0.01s Refine Results
  1. 1
    Scale Development - Theory and Application
    by Robert F. DeVellis
    Published 1991
    Printed Book
  2. 2
    Scale development : theory and applications
    by Robert F DeVellis
    Published 2003
    Printed Book
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