@misc{indiciae0e317cb3897f,
  title = {Adhesion between atomically pure metallic surfaces, part 4 Semiannual report},
  author = {Keller, D. V., Jr. and Tsai, M.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19700023489},
  note = {Source identifier: 19700023489}
}