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An apparatus and program for teaching discriminations |
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| Authors: | Paul F. Spangler Marvin Rosen Robert Turner Peter Ewald |
| Affiliation: | Elwyn Institute, Elwyn, Pennsylvania, USA |
| Abstract: | |
| Keywords: | Requests for reprints and more detailed construction plans should be sent to Paul Spangler Elwyn Institute Elwyn PA 19063. |
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