Academic and public libraries in the Colorado Springs and Denver area won't always have the same items. While you can request items from these libraries be sent to KFL through Prospector, sometimes it's a good idea to see what these institutions have in their collections too. Often, if they have archival materials, those items can only be seen on-site and you will need an appointment. However, looking at their websites will often let you know about their collections and what is available. Public libraries, while they don't always have special collections or archival collections, can have unique collections to their local region so it's always a good idea to check!