共 50 条
- [1] OUTPUT AND INVESTMENT FRONTIERS OF UNITED-STATES IRRIGATED AGRICULTURE WATER RESOURCES BULLETIN, 1985, 21 (04): : 553 - 564
- [3] FUTURE OF UNITED-STATES BEEKEEPING AND UNITED-STATES AGRICULTURE AMERICAN BEE JOURNAL, 1986, 126 (04): : 273 - 275
- [9] PRODUCTIVITY OF AGRICULTURE IN UNITED-STATES RIVISTA DI POLITICA ECONOMICA, 1976, 66 (01): : 90 - 122