改变耕作制度, 扩大复种面积 Gai bian geng zuo zhi du, kuo da fu zhong mian ji
| Corporate Author: | |
|---|---|
| Format: | Book |
| Language: | Chinese |
| Published: |
北京
农业出版社
1958
|
| Subjects: |
| Physical Description: | 189ye |
|---|
| Corporate Author: | |
|---|---|
| Format: | Book |
| Language: | Chinese |
| Published: |
北京
农业出版社
1958
|
| Subjects: |
| Physical Description: | 189ye |
|---|