1. Among the Danish farmers Creator: Perry, E. J. Collection: Core Historical Literature of Agriculture Publisher: The Interstate, Publication Place: Danville, Ill. : Date: 1939 Format: Book
2. Dairy science: its principles and practice in production, management and processing Creator: Petersen, William Earl, 1892- Collection: Core Historical Literature of Agriculture Publisher: J.B. Lippincott Co., Publication Place: Chicago : Date: 1939 Format: Book