TY  - RPRT
TI  - Shear stress and bed roughness estimates for combined wave and current flows over a rippled bed
AU  - D.E. Drake
AU  - D.A. Cacchione
AU  - W.D. Grant
PY  - 2012
DO  - 10.1029/91jc02764
UR  - https://pubs.usgs.gov/publication/70209256
ID  - 70209256
ER  -