General Proceedings, Pt. 1: Report of the 18th Session, International Geological Congress, Great Britain, 1948.

@inproceedings{Balk1952GeneralPP,
  title={General Proceedings, Pt. 1: Report of the 18th Session, International Geological Congress, Great Britain, 1948.},
  author={Robert Balk},
  year={1952}
}