@misc{indiciae2d6fda1fb4d8,
  title = {Stratospheric ozone - Fragile shield},
  author = {Hoffert, M. I. and Stewart, R. W.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750063351},
  note = {Source identifier: 19750063351}
}