@misc{indiciae3b36ebc62757,
  title = {External Tank - The Structure Backbone},
  author = {Welzyn, Kenneth and Pilet, Jeffrey C. and Diecidue-Conners, Dawn and Worden, Michelle and Guillot, Michelle},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20120002893},
  note = {Source identifier: 20120002893}
}