Cultural Universals
The shift from hunting/gathering to agriculture
Cultural diffusion
Expressions of culture

The North American Indian by Edward S. Curtis is one of the most significant and controversial representations of traditional American Indian culture ever produced. Issued in a limited edition from 1907-1930, the publication continues to exert a major influence on the image of Indians in popular culture.
http://memory.loc.gov/ammem/award98/ienhtml/curthome.html

This digital collection integrates over 2,300 photographs and 7,700 pages of text relating to the American Indians in two cultural areas of the Pacific Northwest, the Northwest Coast and Plateau. These resources illustrate many aspects of life and work, including housing, clothing, crafts, transportation, education, and employment.
http://memory.loc.gov/ammem/collections/pacific/

Library launched a five-year effort to add rare and unique items from the Library's vast African-American collections to the National Digital Library.
http://memory.loc.gov/ammem/aaohtml/aohome.html

Emergence of Advertising in America presents over 9,000 images relating to the early history of advertising in the United States. The materials, drawn from the Rare Book, Manuscript, and Special Collections Library at Duke University, include cookbooks, photographs of billboards, print advertisements, trade cards, calendars, almanacs, and leaflets for a multitude of products. Together, they illuminate the early evolution of this most ubiquitous feature of modern American business and culture.
http://memory.loc.gov/ammem/collections/advertising/