Problems, green set /
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| Format: | Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
Published for the Nuffield Foundation by W & R Chambers and J. Murray,
[1969]
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| Subjects: |
| Physical Description: | 52 pages : illustrations ; 21 x 23 cm. |
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| ISBN: | 0550770151 (Chambers). 0719519039 (Murray) |