00393nam a22001457a 4500 257821 257820 OSt 20191002132005.0 191002b xxu||||| |||| 00| 0 eng d 978159385872 N/A Ruhe Valerie Evaluation in distance education and e learning : the unfolding model. U.S.A The Guilford Press 2009 lcc BK 0 0 lcc 0 0 NFIC 40404 SORI GEN 2019-10-02 2 LC 5800.R 84 2009 20153658 2026-07-01 2025-06-23 2025-06-23 2019-10-02 BK