TY - GEN A2 - Denson, N. M. (Norman MacLaren), 1914- A2 - Gibson, M. L. A2 - Sims, G. L. AU - Geological Survey (U.S.) CN - I 19.91:I-2281-B CY - Denver, CO CY - Reston, VA LA - English PB - [For sale by Map Distribution, The Survey] PP - Denver, CO PP - Reston, VA PY - 1992 TI - Geologic and structure map of the south half of the Powder River Basin and adjacent areas, northeastern Wyoming ER -