TY - RPRT TI - Rip currents, mega-cusps, and eroding dunes AU - E.B. Thornton AU - J. MacMahan AU - A. H. Sallenger PY - 2007 DO - 10.1016/j.margeo.2007.02.018 UR - https://pubs.usgs.gov/publication/70030171 ID - 70030171 ER -