Hand-drawn map of drill holes using distance and relation to one another, no date, A3035-00058. Missouri Historical Society Library and Research Center.

Hand-drawn map of drill holes using distance and relation to one another, no date, A3035-00058. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/1642 Accessed September 20, 2024.