TY - GEN A2 - Diffendal, R. F. (Robert Francis) A2 - Nebraska Geological Survey A2 - University of Nebraska--Lincoln. Conservation and Survey Division AU - Geological Survey (U.S.) CN - I 19.91:I-2277 CY - Denver, CO CY - Reston, Va. LA - English PB - [For sale by Map Distribution, U.S. Geological Survey] PP - Denver, CO PP - Reston, Va. PY - 1991 TI - Geologic map showing configuration of the bedrock surface, North Platte 1⁰ x 2⁰ quadrangle, Nebraska ER -