1. Thermoregulation;Bianca,1968
2. History of Agriculture in the Northern United States, 1620–1860;Bidwell,1925
3. Westward Expansion: A History of the American Frontier;Billington,1967
4. From Prairie to Corn Belt;Bogue,1963
5. On Taming and Breaking Steers;Brooks;Southern Agriculturist,1838