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Keywords:National Wildlife Refuge, Nebraska, Refuge, Sandhills, Valentine, bird, birds, burn, burning, drop, ecology, exclusion, fire, fires, flame, flames, grassland, grasslands, great plains, line, management, midwest, periodic, plains, plan, planned, prairie, prescribe, prescribes, restoration, restore, spring, staff, suppression, vegetation, waterfowl, west, wetland, wildfire, wildfires
