As Crane Brinton wrote in theThis book is the final work of the great American historian who opened up a new period in interpreting the history of the United States by emphasizing the importance of the frontier in shaping American culture. Professor Turner wrote
![The United States 1830-1850 [Paperback]](/itemImage/2/3/4/4/2_1498951.jpg "The United States 1830-1850 [Paperback] xxx")