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- [4] AGRICULTURAL LABORERS IN THE UNITED STATES ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE, 1912, 40 : 40 - 44
- [9] AGRICULTURAL EDUCATION IN THE UNITED STATES VOCATIONAL GUIDANCE MAGAZINE, 1930, 8 (04): : 183 - 184
- [10] Agricultural Policy of the United States JOURNAL OF ECONOMIC HISTORY, 1953, 13 (03): : 329 - 330