Purple vetch
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| 格式: | 图书 |
| 语言: | English |
| 出版: |
Washington :
[Government printing office],
1918.
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| 丛编: | Farmers´ bulletin ;
No. 967 |
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| 机构: | Library of the Academy of Sciences of the Czech Republic |
| All Items of this Institution: | all items available from Library of the Academy of Sciences of the Czech Republic |
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Purple Vetch. 
The purple scale The purple scale /