Early Mississippian formations in Missouri [contains pictures of paleontological specimens] Read more about Early Mississippian formations in Missouri [contains pictures of paleontological specimens]
Annual report of the State Geologist for the State of Missouri, 1870 [brief discussion of coal, iron, lead, zinc, nickel, cobalt, silver, tin, copper, and other mineral deposits of the State and statistics of production] Read more about Annual report of the State Geologist for the State of Missouri, 1870 [brief discussion of coal, iron, lead, zinc, nickel, cobalt, silver, tin, copper, and other mineral deposits of the State and statistics of production]
The distribution and synonymy of Ptychospira sexplicata (White and Whitfield) Read more about The distribution and synonymy of Ptychospira sexplicata (White and Whitfield)
