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Studienreise nach USA zum Studium der Landmaschinenberatung : Bericht über das Ergebnis des Projektes Techn. Hilfeleistung Nr 07-94
Buchholz, H., (1952)
A corporate tragedy : the agony of International Harvester Company
Marsh, Barbara, (1985)
Change in agriculture : the Northern United States, 1820-1870
Danhof, Clarence H., (1969)
Planning the farm for profit and stability
Johnson, Neil W., (1962)
Farm machinery : use, depreciation, and replacement
Parsons, Merton S., (1960)
Effect of changes in milk and feed prices and other factors upon milk production in New York
Parsons, Merton S., (1937)