@misc{indiciaefc594168b81f,
  title = {Advantages of using a combination electromagnetic and material shield.},
  author = {Shelton, R. D. and Stern, H. E. and Watts, J. W.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690053533},
  note = {Source identifier: 19690053533}
}