51. Soil fertility Creator: Malherbe, Izak Devilliers, 1888- Collection: Core Historical Literature of Agriculture Publisher: Oxford University Press, Publication Place: London : Date: 1948 Format: Book
52. Future food and agriculture policy: a program for the next ten years Creator: Black, John D. 1883-1960. Collection: Core Historical Literature of Agriculture Publisher: McGraw-Hill Book Co., Publication Place: New York : Date: 1948 Format: Book
53. A critical review of research in land economics Creator: Salter, Leonard A. 1911-1946. Collection: Core Historical Literature of Agriculture Publisher: Univ. of Minnesota Press, Publication Place: Minneapolis : Date: 1948 Format: Book
54. Fundamentals of soil mechanics Creator: Taylor, Donald Wood. Collection: Core Historical Literature of Agriculture Publisher: J. Wiley, Publication Place: New York : Date: 1948 Format: Book
55. Machines for the farm, ranch, and plantation Creator: Turner, Arthur William, 1894- Collection: Core Historical Literature of Agriculture Publisher: McGraw-Hill Book Co., Publication Place: New York : Date: 1948 Format: Book