@misc{indiciae3cd2e093fbca,
  title = {Ground Truth Studies - A hands-on environmental science program for students, grades K-12},
  author = {Katzenberger, John and Chappell, Charles R.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920073185},
  note = {Source identifier: 19920073185}
}