Statement of Disassociation, 1957
Articles of Incorporation (Roundup), 1927
Articles of Incorporation (Butte), 1906
"Fire in the Hole: Slovenians, Croatians,
and Coal Mining on the Musselshell" Anna Zellick, in
Montana: The Magazine of Western History, Spring 1990.
R. W. Richards, "The Central Part of the
Bull Mountain Coal Field, Montana," Contributions to
Economic Geology, 1908, US Geological Survey, US Gov.
Printing Office, 1910.
Maurice Campbell, "Contributions to
Economic Geology, 1908," US Geological Survey [Full Volume].