1. Farm products in industry Creator: Rommel, George M. Collection: Core Historical Literature of Agriculture Publisher: Rae. D. Henkle Co., Publication Place: New York : Date: 1928 Format: Book
2. The waste products of agriculture: their utilization as humus Creator: Howard, Albert, (as Sir,) 1873-1947. Collection: Core Historical Literature of Agriculture Publisher: H. Milford, Oxford University Press, Publication Place: New York : Date: 1931 Format: Book