1. WIKIPEDIA - www.wikioedia.com Historical information on Albert.
2. Albert Bierstadt personal website - www.albertbierstadt.org - His biography information and all the images used on this website.
3. Hudson River School - www.history.vt.edu/hudsonriver - History on his later years.
Several HRS painters began specializing in scenes of the American West. They are sometimes talked about as a separate "Rocky Mountain School," but many of the themes they explore and the approaches to landscape painting they pursue are quite similar to other HRS artists.
4. Sullivan Gross - http://www.sullivangoss.com/
American painters of the early 19th century shared the same philosophy. Visualizing the tracts of Emerson, the artists of the Hudson River School believed that art could be a medium of spiritual and moral change. American artists like Thomas Cole and Frederick Church loosened their ties with European traditions and frequently sketched from nature. Although much younger than the first members of the Hudson River School, Bierstadt is often grouped under this stylistic rubric.
Nevertheless, unlike the other members of the Hudson River School, Bierstadt’s work also displayed an interest in European Romanticism.