25. The organic method on the farm Creator: Rodale, J. I. 1898-1971 Collection: Core Historical Literature of Agriculture Publisher: The Organic Farmer, Publication Place: Emmaus, Pa. : Date: 1949 Format: Book
26. Ploughman's wisdom Creator: Carew, Norman. Collection: Core Historical Literature of Agriculture Publisher: Faber and Faber Publication Place: London, Date: 1949 Format: Book