@misc{indiciae51fa1e5b4795,
  title = {Geophysical abstract 109, April-June 1942},
  author = {W. Ayvazoglou},
  year = {1942},
  doi = {10.3133/b939b},
  url = {https://pubs.usgs.gov/publication/b939B},
  note = {Source identifier: b939B}
}