TY - RPRT TI - Using UAS capabilities to help identify hummock-hollow formation and fragmentation in critical marsh habitat ( Spartina patens ) for mottled ducks in southeast Texas AU - William R. Jones AU - Stephen B. Hartley AU - Camille L. Stagg AU - Michael J. Osland PY - 2019 DO - 10.3133/ofr20191045 UR - https://pubs.usgs.gov/publication/ofr20191045 ID - ofr20191045 ER -