TY - RPRT TI - Digital Shoreline Analysis System (DSAS) version 5.1 user guide AU - Emily A. Himmelstoss AU - Rachel E. Henderson AU - Meredith G. Kratzmann AU - Amy S. Farris PY - 2021 DO - 10.3133/ofr20211091 UR - https://pubs.usgs.gov/publication/ofr20211091 ID - ofr20211091 ER -