| [1] |
.
[J]. Journal of Northern Agriculture, 1999, (5): 12-12.
|
| [2] |
.
[J]. Journal of Northern Agriculture, 1998, (S1): 75-75.
|
| [3] |
.
[J]. Journal of Northern Agriculture, 1998, (4): 10-10.
|
| [4] |
.
[J]. Journal of Northern Agriculture, 1998, (1): 18-18.
|
| [5] |
.
[J]. Journal of Northern Agriculture, 1997, (6): 15-15.
|
| [6] |
.
[J]. Journal of Northern Agriculture, 1994, (5): 7-7.
|
| [7] |
.
[J]. Journal of Northern Agriculture, 1993, (2): 1-1.
|
| [8] |
.
[J]. Journal of Northern Agriculture, 1992, (6): 4-4.
|
| [9] |
.
[J]. Journal of Northern Agriculture, 1991, (4): 22-22.
|
| [10] |
.
[J]. Journal of Northern Agriculture, 1990, (4): 1-1.
|
| [11] |
.
[J]. Journal of Northern Agriculture, 1990, (2): 9-9.
|