• 1 Agricultural machinery
• 1 Agriculture
• 1 Blacksmithing
• 1 Breeding
• 1 Evolution
• 1 Farm management
• 1 Heredity, Human
• 1 Hybridization

• 1 Drew, James M. (James Meddick), 1863-
• 1 East, Edward M. (Edward Murray), 1879-1938
• 1 Hardin, Lowell Stewart, 1917-
• 1 Jones, Donald Forsha, 1890-1963
• 1 Vaughan, Lawrence Moore, 1898-

Limit year range