Problems--purple set.
| Corporate Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York :
Published for the Nuffield Foundation by J.Wiley,
1971.
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| Subjects: |
| Item Description: | 48 cards in accompanying envelope. |
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| Physical Description: | 106 pages : illustrations, diagrams ; 21 cm. |