共 50 条
- [2] EXPERIMENTING FARMERS AND AGRICULTURAL-RESEARCH RURAL HOUSEHOLDS IN EMERGING SOCIETIES: TECHNOLOGY AND CHANGE IN SUB-SAHARAN AFRICA, 1991, : 11 - 21
- [5] UPLAND SOIL-EROSION SIMULATION FOR AGRICULTURAL WATERSHEDS WATER RESOURCES BULLETIN, 1987, 23 (05): : 819 - 827