New Zealand native Ed Mumm instructs one of his colleagues in the use of a Caterpillar excavator on land west of Steamboat Springs last October.

Steamboat Pilot & Today, New Zealand native Ed Mumm instructs one of his colleagues in the use of a Caterpillar excavator on land west of Steamboat Springs last October., [436818576] . Denver Public Library Digital Collections, accessed 15/01/2026, https://digital.denverlibrary.org/nodes/view/914077