Programed learning in mechanical drawing : an experiment to determine the effect of presenting programed units of selected elements of orthographic projection on the ability of pupils to visualize spatial relations /
| Main Author: | |
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| Format: | Thesis Microform Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1968.
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| Subjects: |
| Item Description: | Microform. |
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| Physical Description: | 5, xv, 370 leaves : illustrations |
| Bibliography: | Bibliography: leaves 150-163. |