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- [13] THE ORIGIN AND DEVELOPMENT OF THE LAND-GRANT COLLEGE IN THE UNITED-STATES JOURNAL OF NEGRO EDUCATION, 1962, 31 (03): : 230 - 239
- [16] The Social and Economic Significance of Land Tenure in the Southwestern States, A Report of the Regional Land Tenure Research Project JOURNAL OF FARM ECONOMICS, 1950, 32 (04): : 673 - 676
- [18] EVOLUTION OF THE UNITED-STATES PUBLIC LAND SYSTEM SURVEYING AND MAPPING, 1984, 44 (03): : 259 - 265
- [20] UNITED-STATES IMPORTS BY ORIGIN - A SYSTEM APPROACH WELTWIRTSCHAFTLICHES ARCHIV-REVIEW OF WORLD ECONOMICS, 1985, 121 (04): : 741 - 755