共 50 条
- [22] An overview of U. S. renewable energy development Dianwang Jishu/Power System Technology, 2011, 35 (07): : 48 - 53
- [25] U. N. LAUNCHES INTERNATIONAL WATER DECADE; U. S. ROLE UNCERTAIN Civil engineering New York, N.Y., 1981, 51 (03): : 59 - 62
- [26] ORGANIZATION FOR POLICY PLANNING IN THE U. S. DEPARTMENT OF AGRICULTURE JOURNAL OF FARM ECONOMICS, 1952, 34 (01): : 14 - 34