Postcards and photographic material created by photographer John Albert Topolnicki Sr. featuring the Colorado natural landscape, mountains, abandoned mine sites, ski areas and similar subjects. His photographs are considered the best historical record of Breckenridge Ski Resort and Summit County, Colorado landscapes in the early 1960s-1970s.

Telephone directories for Breckenridge, Colorado, and surrounding areas. Includes towns in Summit, Lake, and Eagle counties.