Many libraries, archives, and museums have digitized primary source materials and put them into digital collections. There are numerous online directories that help identify the location of primary sources and digital repositories which offer digitized resources. In addition to using specialized directories, such as those highlighted below, try a general Web search when seeking primary sources.
The collections below help researchers efficiently locate materials among millions of digitized materials and resources in archives and special collections. Many materials are free online. Some contain books only; others have videos, images, and more.
Below are Colorado primary source collections. Some offer materials online. Many more items can be discovered by visiting in person or talking to a staff member.