@misc{indiciaee20a9beec112,
  title = {The cyclization of epoxyolefins. IV.},
  author = {Clark, B. C., Jr. and Goldsmith, D. J. and Joines, R. C.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680035493},
  note = {Source identifier: 19680035493}
}