State Agencies

• Wyoming State Historic Preservation Office
• Kansas State Historical Society
• Iowa Office of the State Archaeologist--Research Projects
• State Historical Society of North Dakota, State Historic Preservation Office
• South Dakota State Historical Society, Archaeological Research Center
• Colorado Historical Society, Office of Archaeology and Historic Preservation
• Montana State Historic Preservation Office

Organizations

• South Dakota Archaeological Society
• North Dakota Archaeological Association
• Colorado Archaeological Society
• Colorado Council of Professional Archaeologists
• Plains Anthropological Society
• Nebraska Association of Professional Archaeologists
• Montana Archaeological Society
• Wyoming Association of Professional Archaeologists
• Canadian Archaeological Association
• San Luis Valley Archaeology Network
• Quest Archaeological Research Program
• Center for the Study of the First Americans (New!)

Archaeological Sites

• People of the Upper Missouri
• On-A-Slant Virtual Village
• Like-A-Fishhook Village/Fort Berthold Reconstruction
• Head-Smashed-In Buffalo Jump
• Writing-On-Stone Provincial Park
• Knife River Indian Villages National Historic Site
• Garden Coulee Site
• Blackwater Draw
• Pictograph Cave, Montana
• Tenderfoot Site, Gunnison County, Colorado
• Alibates Flint Quarries (New!)

Museums

• Buffalo Bill Historical Center--Plains Indian Museum
• North Dakota Heritage Center
• The Journey Museum
• Museum of the Plains Indian (New!)
  

Online Research

• Bancroft Library Rock Art Bibliographic Database
• Smithsonian Institution Research Information System
• Journals of the Lewis and Clark Expedition
• Southwestern Lore Index (1935-2005)
• Great Plains Research
• High Plains Regional Climate Center
• Library of Western Fur Trade Historical Source Document
• Center for Great Plains Studies
• National Museum of Man/Archaeological Survey of Canada Mercury Series Bibliography (New!)
• Edward S. Curtis Resources (including selected text and images from The North American Indian) (New!)
• Biographical Dictionary of the Mandan, Hidatsa, and Arikara (New!)
• Library of Congress Prints and Photographs Online Catalog (New!)
• Internet Archive (New!)
  

Other

• North American Database of Archaeological Geophysics
• Gault School of Archaeological Research
• Texas Beyond History
• Prehistory of the Big Bend Reservoir