TY - RPRT TI - Delaware River: Evidence for its former extension to Wilmington Submarine Canyon AU - D.C. Twichell AU - H.J. Knebel AU - D. W. Folger PY - 1977 DO - 10.1126/science.195.4277.483 UR - https://pubs.usgs.gov/publication/70009955 ID - 70009955 ER -