books.google.fr - When it appeared in 1949, the first edition of Ray Allen Billington's Westward Expansion set a new standard for scholarship in western American history, and the book's reputation among historians, scholars, and students grew through four subsequent editions. This abridgment and revision of Billington...https://books.google.fr/books/about/Westward_Expansion.html?hl=fr&id=YoV-k7VcyZ0C&utm_source=gb-gplus-shareWestward Expansion
