1. Hatchery management Creator: Hartman, Roland Clarence, 1906- Collection: Core Historical Literature of Agriculture Publisher: Orange Judd Publishing Company, Inc., Publication Place: New York : Date: 1932 Format: Book
2. Keeping chickens in cages: a description of the outdoor individual cage system of poultry management as developed mainly in southern California. Creator: Hartman, Roland Clarence, 1906- Collection: Core Historical Literature of Agriculture Publisher: [s.n.], Publication Place: Redlands, Calif. : Date: 1950 Format: Book