TY - RPRT TI - Ferromanganese crusts from Necker Ridge, Horizon Guyot and S.P. Lee Guyot: Geological considerations AU - James R. Hein AU - Frank T. Manheim AU - William C. Schwab AU - Alice S. Davis PY - 1985 DO - 10.1016/0025-3227(85)90132-x UR - https://pubs.usgs.gov/publication/70135830 ID - 70135830 ER -