@misc{indiciaeb5dcaebc86f0,
  title = {Geophysical abstracts 100-103, January-December 1940},
  author = {W. Ayvazoglou},
  year = {1941},
  doi = {10.3133/b925},
  url = {https://pubs.usgs.gov/publication/b925},
  note = {Source identifier: b925}
}