共 50 条
- [32] Elements of Soil Conservation JOURNAL OF LAND AND PUBLIC UTILITY ECONOMICS, 1947, 23 (04): : 444 - 445
- [34] The Economics of Soil Conservation CANADIAN JOURNAL OF ECONOMICS & POLITICAL SCIENCE, 1943, 9 (02): : 262 - 265
- [35] Soil conservation in Australia JOURNAL OF SOIL AND WATER CONSERVATION, 2003, 58 (06) : 112A - 113A