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Author/Creator
- Caspard-Karydis, Pénélope2
- Institut national de recherche pédagogique (France)2
- Powell, Norman J. (Norman John), 1908-2
- Caspard, Pierre, 1944-1
- Colorado State Teachers College1
- Creative Education Foundation1
- Pennsylvania State College. School of Education1
- Pennsylvania State University. Dept. of Education1
- Postgraduate Medical Institute (Peshawar, Pakistan)1