1. Hagar's gold belt map of Central Colorado Maps Pennsylvania State University Public content 1900. C.E. Hagar Printing Company. Gold mines and mining--Colorado, Central--Maps.
2. The Evening Telegraph's claim map of the Cripple Creek District, El Paso County [Teller County] Colorado Maps Pennsylvania State University Public content 1895. Snell, Edward S. Mining claims--Colorado--Teller County--Maps.