TY - RPRT TI - USGS, NPS, and NASA investigate horse-grazing impacts on Assateague Island dunes using airborne lidar surveys AU - Georgia H. Stoppelaire AU - John Brock AU - Chris Lea AU - Mark Duffy AU - William Krabill PY - 2001 DO - 10.3133/ofr01382 UR - https://pubs.usgs.gov/publication/ofr01382 ID - ofr01382 ER -