City of Greeley Historic Preservation – Information on the Greeley Historic Preservation Commission and program, including the list of designated properties and districts on Greeley’s Historic Register

History Colorado – The State of Colorado’s department for historic preservation and the State Historical Fund

Colorado Preservation, Inc. – The statewide historic preservation nonprofit in Colorado, home of Colorado’s Most Endangered Places List and the nationally-known annual Saving Places Conference

National Trust for Historic Preservation – The U.S.’s nonprofit for historic preservation, administering programs such as Main Street, Save America’s Treasures, and Preservation Briefs

National Park Service Secretary of the Interior Standards for Rehabilitation – Important reference document for qualifying historic preservation techniques and practices