@misc{indiciae503a86a53ff6,
  title = {Natural offshore oil seepage and related tarball accumulation on the California coastline — Santa Barbara Channel and the southern Santa Maria Basin; source identification and inventory},
  author = {T.D. Lorenson and Frances D. Hostettler and Robert J. Rosenbauer and Kenneth E. Peters and Jennifer A. Dougherty and Keith A. Kvenvolden and Christina E. Gutmacher and Florence L. Wong and William R. Normark},
  year = {2009},
  doi = {10.3133/ofr20091225},
  url = {https://pubs.usgs.gov/publication/ofr20091225},
  note = {Source identifier: ofr20091225}
}