@misc{indiciaebe4db1bf432f,
  title = {Improved method for cladding the inside of metal tubes},
  author = {Maag, W. L. and Mattson, W. F.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700000692},
  note = {Source identifier: 19700000692}
}