1. Research methods on farm use of tractors Creator: Jasny, Naum, 1883-1967. Collection: Core Historical Literature of Agriculture Publication Place: New York : Columbia University Press, Date: 1938 Format: Book
2. An introduction to soil science Creator: Isgur, Benjamin, 1911- Collection: Core Historical Literature of Agriculture Publisher: Agricultural Scientific Publishing Co., Publication Place: Boston, Mass. : Date: 1938 Format: Book
3. Economic nationalism and the farmer Creator: Bunce, Arthur C. 1901-1953. Collection: Core Historical Literature of Agriculture Publisher: Collegiate Press, Inc., Publication Place: Ames, Iowa : Date: 1938 Format: Book