@misc{indiciae82c3a80265a2,
  title = {Geophysical abstracts 136, January-March 1949},
  author = {M.C. Rabbitt and V.L. Skitsky and S.T. Vesselowsky},
  year = {1949},
  doi = {10.3133/b966a},
  url = {https://pubs.usgs.gov/publication/b966A},
  note = {Source identifier: b966A}
}