Colorado Historic Newspaper Collection
Colorado's Historic Newspaper Collection (CHNC) currently includes 117 newspapers published in Colorado from 1859 to 1930. Newspapers come from 66 cities and 41 counties throughout the state, which were published in English, German, Spanish, or Swedish. Currently available newspapers include The Colorado Daily Chieftain/Pueblo Chieftain from 1872-1877 and The Colorado Weekly Chieftain from 1868-1880, both published in Pueblo.

HeritageQuest
HeritageQuest Online™ is an essential collection of unique material for both genealogical and historical researchers, with coverage dating back to the late 1700s. Find ancestors in the set of U.S. Federal Census images from 1790-1930 including name indexes form many years. Search for people and places in over 20,000 family and local histories. Additionally, there are more than 250 primary-source documents such as tax lists, city directories, probate records, Revolutionary War records, Freedman's bank records and more.

Sanborn Maps - PCCLD has digital access to digital maps for Colorado, New Mexico and Wyoming
Sanborn Maps provides digital access to large-scale maps charting the growth and development of Amercian towns and cities from 1867-1970. Sanborn maps are valuable historical tools for urban specialists, social historians, architects, geographers, genealogists, local historians, planners, environmentalists and anyone who wants to learn about the history, growth, and development of American cities, towns, and neighborhoods.