TY - RPRT TI - Petroleum source potential of the Lower Cretaceous mudstone succession of the NPRA and Colville Delta area, North Slope Alaska, based on sonic and resistivity logs AU - Margaret A. Keller AU - Kenneth J. Bird PY - 2003 DO - 10.3133/ofr03325 UR - https://pubs.usgs.gov/publication/ofr03325 ID - ofr03325 ER -