TY - RPRT TI - Scanning electron microscopic evaluation of broad ion beam milling effects to sedimentary organic matter: Sputter-induced artifacts or naturally occurring porosity? AU - Brett J. Valentine AU - Paul C. Hackley PY - 2023 DO - 10.1016/j.coal.2023.104348 UR - https://pubs.usgs.gov/publication/70248285 ID - 70248285 ER -