TY - RPRT TI - Sea floor topography of Quadrangle 6 in the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts AU - P. C. Valentine AU - T. S. Unger AU - J. L. Baker AU - E. T. Roworth PY - 1997 DO - 10.3133/ofr97507 UR - https://pubs.usgs.gov/publication/ofr97507 ID - ofr97507 ER -