TY - RPRT TI - Geology and ground-water resources of the upper Niobrara River basin, Nebraska and Wyoming, with a section on chemical quality of the ground water AU - Edward Bradley AU - F. Rainwater PY - 1956 DO - 10.3133/wsp1368 UR - https://pubs.usgs.gov/publication/wsp1368 ID - wsp1368 ER -