Invention and monopoly.
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| 格式: | 图书 |
| 语言: | English |
| 出版: |
London :
Woolwich Polytechnic, Dept. of Economics and Business Studies,
[1968].
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| 丛编: | Woolwich economic papers ;
no. 15. |
| 主题: |
| 实物描述: | 39 p. |
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