MLA (8th Edition)
Geologic Map Showing Thickness of Sedimentary Rocks From Ground Surface to the Top of the Upper Cretaceous Pierre Shale In the North Half of the Powder River Basin, Southeastern Montana and Northeastern Wyoming. For sale by Map Distribution, The Survey, 1994.
APA (7th Edition)
Geologic map showing thickness of sedimentary rocks from ground surface to the top of the upper Cretaceous Pierre Shale in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming. (1994). For sale by Map Distribution, The Survey.