共 50 条
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- [26] 2 CENTURIES OF AMERICAN-AGRICULTURE - WISER,V MID-AMERICA-AN HISTORICAL REVIEW, 1978, 60 (01): : 60 - 61
- [28] SURPLUS ... THE RIDDLE OF AMERICAN-AGRICULTURE - BIRD,AR JOURNAL OF FARM ECONOMICS, 1962, 44 (03): : 912 - 914