Commercial research; an outline of working principles
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| OCLC: | 519765 |
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| 主要作者: | |
| 语言: | English |
| 出版: |
New York,
Macmillan,
1919.
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| 主题: | |
| 格式: | Monograph Note that CRL will digitize material from the collection when copyright allows. |