@misc{indiciaeadf8c98f7da5,
  title = {Structural concepts for very large (400-meter-diameter) solar concentrators},
  author = {Mikulas, Martin M., Jr. and Hedgepeth, John M.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900000837},
  note = {Source identifier: 19900000837}
}