@misc{indiciae7f7084e0cd51,
  title = {Improved wax mold technique forms complex passages in solid structures},
  author = {Hellbaum, R. F. and Page, A. D. and Phillips, A. R.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710000062},
  note = {Source identifier: 19710000062}
}