@misc{indiciaeaa4be8962008,
  title = {Economic analysis of materials processing in space},
  author = {Vachon, R. I. and Wilcox, R. C. and Lacy, A. W. and Hale, C. W. and Beckett, S. D. and Canterberry, J. B.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750025054},
  note = {Source identifier: 19750025054}
}