@misc{indiciae23a30d9f0aa2,
  title = {Adhesion between automatically pure metallic surfaces, part 4 Semiannual report},
  author = {Keller, D. V., Jr. and Tsai, M.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680020071},
  note = {Source identifier: 19680020071}
}